Jeff Strickland

As a simple guideline, the Smog Equipment must be either for the motor OR
for the vehicle, WHICHEVER IS NEWER. If you put in a '90 motor, then you
have to maintain the same level of smog equipment that the motor requires.
If you install a pre-'90 motor, you must increase the smog equipment to '90
levels. If you put in a post-'90 motor, the smog equipment of the motor must
be fitted in the vehicle.

There is a guy near Fresno (center-state, California) that installs a Ford
5.0L into Jeeps. I have heard a mixed bag of comments, but he should be
worth a look ...




"Rick Sink" <ricksink@mindspring.com> wrote in message
news:41abefb7.695475468@news.east.earthlink.net...
> My son's 90 YJ has the 4.2L six with 5 speed. Is there such a thing as
> swapping the 6 out for a V8?...and still meeting emissions laws? Could
> the trans/clutch stay...or would the V8 require a new trans? Any way
> to get a Chevy small block in it, with emissions equipment?
>
> Rick

Jeff Strickland

As a simple guideline, the Smog Equipment must be either for the motor OR
for the vehicle, WHICHEVER IS NEWER. If you put in a '90 motor, then you
have to maintain the same level of smog equipment that the motor requires.
If you install a pre-'90 motor, you must increase the smog equipment to '90
levels. If you put in a post-'90 motor, the smog equipment of the motor must
be fitted in the vehicle.

There is a guy near Fresno (center-state, California) that installs a Ford
5.0L into Jeeps. I have heard a mixed bag of comments, but he should be
worth a look ...




"Rick Sink" <ricksink@mindspring.com> wrote in message
news:41abefb7.695475468@news.east.earthlink.net...
> My son's 90 YJ has the 4.2L six with 5 speed. Is there such a thing as
> swapping the 6 out for a V8?...and still meeting emissions laws? Could
> the trans/clutch stay...or would the V8 require a new trans? Any way
> to get a Chevy small block in it, with emissions equipment?
>
> Rick

Jeff Strickland

As a simple guideline, the Smog Equipment must be either for the motor OR
for the vehicle, WHICHEVER IS NEWER. If you put in a '90 motor, then you
have to maintain the same level of smog equipment that the motor requires.
If you install a pre-'90 motor, you must increase the smog equipment to '90
levels. If you put in a post-'90 motor, the smog equipment of the motor must
be fitted in the vehicle.

There is a guy near Fresno (center-state, California) that installs a Ford
5.0L into Jeeps. I have heard a mixed bag of comments, but he should be
worth a look ...




"Rick Sink" <ricksink@mindspring.com> wrote in message
news:41abefb7.695475468@news.east.earthlink.net...
> My son's 90 YJ has the 4.2L six with 5 speed. Is there such a thing as
> swapping the 6 out for a V8?...and still meeting emissions laws? Could
> the trans/clutch stay...or would the V8 require a new trans? Any way
> to get a Chevy small block in it, with emissions equipment?
>
> Rick

Ted

If you use a Service Replacement Block the "motor" has no Model Year.
This is also true of engines originally in marine, industrial, ag,
aviation service...there's no VIN. Not that they're suitable for Jeeps
but a Detroit Diesel has a serial number on the rocker box cover...and
is removable.

Ted

If you use a Service Replacement Block the "motor" has no Model Year.
This is also true of engines originally in marine, industrial, ag,
aviation service...there's no VIN. Not that they're suitable for Jeeps
but a Detroit Diesel has a serial number on the rocker box cover...and
is removable.

Ted

If you use a Service Replacement Block the "motor" has no Model Year.
This is also true of engines originally in marine, industrial, ag,
aviation service...there's no VIN. Not that they're suitable for Jeeps
but a Detroit Diesel has a serial number on the rocker box cover...and
is removable.