Jeep Strokers

I have a heavily modified 84CJ7 with a crack in the clifford header. So I'm thinking of replacing the header with Borla. I was also thinking about gaining additional HP for highway driving by replacing my 4.2 head with a 4.0 head. I already have a larger cam, Howell FI and HEI distributor.

My question is would it be worth swapping in: HESCO Part Number:HES4240CHC, - Converts the 4.2L to the 4.0L cylinder head using the superior 1991-up high port head casting. Designed to let your fuel starved 4.2L perform to it's fullest potential. Provides a snappy throttle response with increased torque and horsepower. Complete bolt-on kit includes modified cylinder head with head gasket and valve cover. Will require a 4.0L exhaust manifold or header.

This seems like an easy swap, has anyone done it, successfully?

Thanks,

84cj

I wouldn't buy it, I would Just get the 91 (7120) head either oat your local Junkyard or local classified and have it reconditioned locally
and install it, there is Nothing special that they do that you can not do yourself or have your machine shop do I actually can not think of anything that needs to be moddified...

http://www.enginebuildermag.com/2004/10 ... der-heads/

Thanks for the reply. For now I am just going to swap out the old Clifford Header (10yrs) with a new Clifford header. Simple.