Any one ever put a 4.0 H.O head on a regular 4.0

 

Sure. Why?

 

HAA HAAA HAAAA!

 

there's a direct answer for ya. Hahaha

 

it won't make it a high output tho.

 

Sure won't. The exhaust manifold on an HO is better flowing and the throttle body is larger. Cam is the same through 95 or so.

 

Just wondering cause I just bought a 1990 and it don't have the H.O. in it and I've got all the parts for a HO FROM A 1995

 

nope. you can't turn the renix into an h.o.
it's all about the computer with those parts.

 

Ok thanks for the info guys what about intake,throtlebody,and exhaust manifold swap onto the renix

 

You can put that HO into your Renix. Just use your intake and exhaust manifolds along with the intake/exhaust gasket for your Renix. Be sure to use your distributor, valve cover, and flywheel/flexplate from the Renix. I've done this a few times. No big deal.

 

sorry, i meant yes you can install those parts, but no it won't make it an H.O.

 

I understood you.

 

Is it worth all of that work for an extra 13 hp at the most? I'd leave it unless you plan on rebuilding it or putting in a stroker.

 

The HP gain with teh HO head is all in the upper RPM ranges. Torque is the same Renix to HO.

HO got some, but not all, of it's roughly 10 HP from the head design. Just as much came from the throttle body being 58mm versus 52mm on a Renix and the fact the HO had a better flowing exhaust manifold than Renix.

HO was an excellent marketing scam by Chryco.

 

I have a 98 Cherokee W an 0630 head casting can I replace the head W a 7120 casting head?