Question on 258 to 304 swap
Next couple months I will be getting a remaned engine to replace my 258,
( 81 CJ7 ) as I wont be sending the core back, ( $150.00 core charge, I think shipping will be 1/2 that ) is there any difference in the 258 to 304 as far as the parts I have to swap over on a remanned long block, do all swap, some swap, or not worth the trouble for a few more horses? |
Re: Question on 258 to 304 swap
"Greg" <greglc84@hotmail.com> wrote in message
news:aSxFd.68064$8l.32156@pd7tw1no... > Next couple months I will be getting a remaned engine to replace my 258, > ( 81 CJ7 ) as I wont be sending the core back, ( $150.00 core charge, I > think shipping will be 1/2 that ) is there any difference in the 258 to > 304 as far as the parts I have to swap over on a remanned long block, do > all swap, some swap, or not worth the trouble for a few more horses? Other than the obvious distributor and wires, intake and exhaust manifolds, carb, front exhaust, oil pan, valve covers, and probably the radiator? I just did this and chose to go with a 258 for exactly this reason. Swap needed almost nothing. If I was going to bite the bullet and do a V8, I'd do a Chevy small block. Its a bigger job, you'd probably need a new transmission, but you have an engine that still has parts available. Plus you can get one built to whatever HP/specs you want. Almost did this but when I thought about it the 258 was enough, I drive the jeep easy. I have gone to an HEI distributor and Weber carb, they help a bit. |
Re: Question on 258 to 304 swap
"Greg" <greglc84@hotmail.com> wrote in message
news:aSxFd.68064$8l.32156@pd7tw1no... > Next couple months I will be getting a remaned engine to replace my 258, > ( 81 CJ7 ) as I wont be sending the core back, ( $150.00 core charge, I > think shipping will be 1/2 that ) is there any difference in the 258 to > 304 as far as the parts I have to swap over on a remanned long block, do > all swap, some swap, or not worth the trouble for a few more horses? Other than the obvious distributor and wires, intake and exhaust manifolds, carb, front exhaust, oil pan, valve covers, and probably the radiator? I just did this and chose to go with a 258 for exactly this reason. Swap needed almost nothing. If I was going to bite the bullet and do a V8, I'd do a Chevy small block. Its a bigger job, you'd probably need a new transmission, but you have an engine that still has parts available. Plus you can get one built to whatever HP/specs you want. Almost did this but when I thought about it the 258 was enough, I drive the jeep easy. I have gone to an HEI distributor and Weber carb, they help a bit. |
Re: Question on 258 to 304 swap
"Greg" <greglc84@hotmail.com> wrote in message
news:aSxFd.68064$8l.32156@pd7tw1no... > Next couple months I will be getting a remaned engine to replace my 258, > ( 81 CJ7 ) as I wont be sending the core back, ( $150.00 core charge, I > think shipping will be 1/2 that ) is there any difference in the 258 to > 304 as far as the parts I have to swap over on a remanned long block, do > all swap, some swap, or not worth the trouble for a few more horses? Other than the obvious distributor and wires, intake and exhaust manifolds, carb, front exhaust, oil pan, valve covers, and probably the radiator? I just did this and chose to go with a 258 for exactly this reason. Swap needed almost nothing. If I was going to bite the bullet and do a V8, I'd do a Chevy small block. Its a bigger job, you'd probably need a new transmission, but you have an engine that still has parts available. Plus you can get one built to whatever HP/specs you want. Almost did this but when I thought about it the 258 was enough, I drive the jeep easy. I have gone to an HEI distributor and Weber carb, they help a bit. |
Re: Question on 258 to 304 swap
Thanks, like you I don't need the extra power, just figured if everything
was just a direct swap then what the hell. "Charlie Dellacona" <cdellacona@yahoo.com> wrote in message news:QtWdnfvRCJYcX3vcRVn-qQ@comcast.com... > "Greg" <greglc84@hotmail.com> wrote in message > news:aSxFd.68064$8l.32156@pd7tw1no... >> Next couple months I will be getting a remaned engine to replace my 258, >> ( 81 CJ7 ) as I wont be sending the core back, ( $150.00 core charge, I >> think shipping will be 1/2 that ) is there any difference in the 258 to >> 304 as far as the parts I have to swap over on a remanned long block, do >> all swap, some swap, or not worth the trouble for a few more horses? > > Other than the obvious distributor and wires, intake and exhaust > manifolds, > carb, front exhaust, oil pan, valve covers, and probably the radiator? > > I just did this and chose to go with a 258 for exactly this reason. Swap > needed almost nothing. > > If I was going to bite the bullet and do a V8, I'd do a Chevy small block. > Its a bigger job, you'd probably need a new transmission, but you have > an engine that still has parts available. Plus you can get one built to > whatever HP/specs you want. > > Almost did this but when I thought about it the 258 was enough, I drive > the > jeep easy. I have gone to an HEI distributor and Weber carb, they help a > bit. > > |
Re: Question on 258 to 304 swap
Thanks, like you I don't need the extra power, just figured if everything
was just a direct swap then what the hell. "Charlie Dellacona" <cdellacona@yahoo.com> wrote in message news:QtWdnfvRCJYcX3vcRVn-qQ@comcast.com... > "Greg" <greglc84@hotmail.com> wrote in message > news:aSxFd.68064$8l.32156@pd7tw1no... >> Next couple months I will be getting a remaned engine to replace my 258, >> ( 81 CJ7 ) as I wont be sending the core back, ( $150.00 core charge, I >> think shipping will be 1/2 that ) is there any difference in the 258 to >> 304 as far as the parts I have to swap over on a remanned long block, do >> all swap, some swap, or not worth the trouble for a few more horses? > > Other than the obvious distributor and wires, intake and exhaust > manifolds, > carb, front exhaust, oil pan, valve covers, and probably the radiator? > > I just did this and chose to go with a 258 for exactly this reason. Swap > needed almost nothing. > > If I was going to bite the bullet and do a V8, I'd do a Chevy small block. > Its a bigger job, you'd probably need a new transmission, but you have > an engine that still has parts available. Plus you can get one built to > whatever HP/specs you want. > > Almost did this but when I thought about it the 258 was enough, I drive > the > jeep easy. I have gone to an HEI distributor and Weber carb, they help a > bit. > > |
Re: Question on 258 to 304 swap
Thanks, like you I don't need the extra power, just figured if everything
was just a direct swap then what the hell. "Charlie Dellacona" <cdellacona@yahoo.com> wrote in message news:QtWdnfvRCJYcX3vcRVn-qQ@comcast.com... > "Greg" <greglc84@hotmail.com> wrote in message > news:aSxFd.68064$8l.32156@pd7tw1no... >> Next couple months I will be getting a remaned engine to replace my 258, >> ( 81 CJ7 ) as I wont be sending the core back, ( $150.00 core charge, I >> think shipping will be 1/2 that ) is there any difference in the 258 to >> 304 as far as the parts I have to swap over on a remanned long block, do >> all swap, some swap, or not worth the trouble for a few more horses? > > Other than the obvious distributor and wires, intake and exhaust > manifolds, > carb, front exhaust, oil pan, valve covers, and probably the radiator? > > I just did this and chose to go with a 258 for exactly this reason. Swap > needed almost nothing. > > If I was going to bite the bullet and do a V8, I'd do a Chevy small block. > Its a bigger job, you'd probably need a new transmission, but you have > an engine that still has parts available. Plus you can get one built to > whatever HP/specs you want. > > Almost did this but when I thought about it the 258 was enough, I drive > the > jeep easy. I have gone to an HEI distributor and Weber carb, they help a > bit. > > |
Re: Question on 258 to 304 swap
I know the engine mounts are different. The mount pad also go reverse
with the torque hooks on the other side. I would imagine the rad is different, the 258 rad is barely enough for the 6. I too would have gone 350 if V8, but stayed with the 258. Once the computer is gone out of the ignition they go pretty good. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail 88 Cherokee 235 BFG AT's Greg wrote: > > Thanks, like you I don't need the extra power, just figured if everything > was just a direct swap then what the hell. > > "Charlie Dellacona" <cdellacona@yahoo.com> wrote in message > news:QtWdnfvRCJYcX3vcRVn-qQ@comcast.com... > > "Greg" <greglc84@hotmail.com> wrote in message > > news:aSxFd.68064$8l.32156@pd7tw1no... > >> Next couple months I will be getting a remaned engine to replace my 258, > >> ( 81 CJ7 ) as I wont be sending the core back, ( $150.00 core charge, I > >> think shipping will be 1/2 that ) is there any difference in the 258 to > >> 304 as far as the parts I have to swap over on a remanned long block, do > >> all swap, some swap, or not worth the trouble for a few more horses? > > > > Other than the obvious distributor and wires, intake and exhaust > > manifolds, > > carb, front exhaust, oil pan, valve covers, and probably the radiator? > > > > I just did this and chose to go with a 258 for exactly this reason. Swap > > needed almost nothing. > > > > If I was going to bite the bullet and do a V8, I'd do a Chevy small block. > > Its a bigger job, you'd probably need a new transmission, but you have > > an engine that still has parts available. Plus you can get one built to > > whatever HP/specs you want. > > > > Almost did this but when I thought about it the 258 was enough, I drive > > the > > jeep easy. I have gone to an HEI distributor and Weber carb, they help a > > bit. > > > > |
Re: Question on 258 to 304 swap
I know the engine mounts are different. The mount pad also go reverse
with the torque hooks on the other side. I would imagine the rad is different, the 258 rad is barely enough for the 6. I too would have gone 350 if V8, but stayed with the 258. Once the computer is gone out of the ignition they go pretty good. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail 88 Cherokee 235 BFG AT's Greg wrote: > > Thanks, like you I don't need the extra power, just figured if everything > was just a direct swap then what the hell. > > "Charlie Dellacona" <cdellacona@yahoo.com> wrote in message > news:QtWdnfvRCJYcX3vcRVn-qQ@comcast.com... > > "Greg" <greglc84@hotmail.com> wrote in message > > news:aSxFd.68064$8l.32156@pd7tw1no... > >> Next couple months I will be getting a remaned engine to replace my 258, > >> ( 81 CJ7 ) as I wont be sending the core back, ( $150.00 core charge, I > >> think shipping will be 1/2 that ) is there any difference in the 258 to > >> 304 as far as the parts I have to swap over on a remanned long block, do > >> all swap, some swap, or not worth the trouble for a few more horses? > > > > Other than the obvious distributor and wires, intake and exhaust > > manifolds, > > carb, front exhaust, oil pan, valve covers, and probably the radiator? > > > > I just did this and chose to go with a 258 for exactly this reason. Swap > > needed almost nothing. > > > > If I was going to bite the bullet and do a V8, I'd do a Chevy small block. > > Its a bigger job, you'd probably need a new transmission, but you have > > an engine that still has parts available. Plus you can get one built to > > whatever HP/specs you want. > > > > Almost did this but when I thought about it the 258 was enough, I drive > > the > > jeep easy. I have gone to an HEI distributor and Weber carb, they help a > > bit. > > > > |
Re: Question on 258 to 304 swap
I know the engine mounts are different. The mount pad also go reverse
with the torque hooks on the other side. I would imagine the rad is different, the 258 rad is barely enough for the 6. I too would have gone 350 if V8, but stayed with the 258. Once the computer is gone out of the ignition they go pretty good. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail 88 Cherokee 235 BFG AT's Greg wrote: > > Thanks, like you I don't need the extra power, just figured if everything > was just a direct swap then what the hell. > > "Charlie Dellacona" <cdellacona@yahoo.com> wrote in message > news:QtWdnfvRCJYcX3vcRVn-qQ@comcast.com... > > "Greg" <greglc84@hotmail.com> wrote in message > > news:aSxFd.68064$8l.32156@pd7tw1no... > >> Next couple months I will be getting a remaned engine to replace my 258, > >> ( 81 CJ7 ) as I wont be sending the core back, ( $150.00 core charge, I > >> think shipping will be 1/2 that ) is there any difference in the 258 to > >> 304 as far as the parts I have to swap over on a remanned long block, do > >> all swap, some swap, or not worth the trouble for a few more horses? > > > > Other than the obvious distributor and wires, intake and exhaust > > manifolds, > > carb, front exhaust, oil pan, valve covers, and probably the radiator? > > > > I just did this and chose to go with a 258 for exactly this reason. Swap > > needed almost nothing. > > > > If I was going to bite the bullet and do a V8, I'd do a Chevy small block. > > Its a bigger job, you'd probably need a new transmission, but you have > > an engine that still has parts available. Plus you can get one built to > > whatever HP/specs you want. > > > > Almost did this but when I thought about it the 258 was enough, I drive > > the > > jeep easy. I have gone to an HEI distributor and Weber carb, they help a > > bit. > > > > |
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