RiverRunner66 via CarKB.com

Damn Jeff, you beat me to it.
Do a thorough search here and on the magazines websites. You will find lots
of instructions on putting the 4.0 head on in place of your original. Much
better head design. ITs about as common as dropping in a ford 8.8 into a YJ.
I think it involves plugging a couple of water jacket holes, but no big deal
other than that. Also, the cam isn't that much farther in with the heads off,
go for it, and put a nice towing grind in there and you'll be glad you did.
Just remove the radiator, timing cover and gears/w/chain, and you can pull
the cam out.

Jeff Strickland wrote:
>I think you should be prepared to replace the cam, and some would insist
>that you must replace the cam, but I have another worm to crawl out of the
>can ...
>
>My recommendation is that you strongly consider replacing the head with a
>4.0L head. The intake track on the 4.0 head is much better than that of the
>258. The track is straighter and breathes much better.
>
>> I'd like to do the top end of my old 258 incl. hyd. lifters, push rods,
>> rocker arms, pivots, valves, guides, etc.
>>
>> Has anyone done this w/o changing cam ? I know the experts always
>> recommend a cam change when doing lifters.

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