Originally Posted by jprevette
I'm looking into getting new heads for my truck (1996) and want to know witch ones flow the best and what you recommend.
I recommend either Indy X RHS heads or Edelbrock heads, of the two I would go with Indy X because they're cast iron and cast iron is a little more durable especially if you overheat the engine. The reason for those two is because in the magnum heads chrysler designed the push rod guides to be partially in the intake port which obstructs air flow, the indy heads as well as the edel brocks have redesigned the ports for maximum flow, of course you can port them more and smooth out the walls to reduce turbulance. One issue with the edelbrock heads is the combustion chamber size is smaller for more compression however because they're smaller you might have valve clearance problems with the piston if you have a lift over .5" even if it's less I prefer to have more clearance for expansion etc...
The RHS heads are also affordable compared to the 700 a piece edel brocks. For one edelbrock you can buy a pair of RHS's with the valve train installed. If you are looking for all out performance, increase the lift most of all in these engines, they have poor lift especially the 360 my god... The cam in the 318 is a very good cam, however I would try to get some more overlap which would not only make a sweet sounding engine but have great performance, because you won't have EGR (1996 no EGR) then the larger overlap will have a EGR effect to keep combustion temps down. I also would change out the intake manifold as well, one that has less plenum volume for more HP and RPM's.
Next on the agenda would be a M/P ECM. I also would recommend you get headers of course, I like the pacesetters but the shorty headers Holley sells are sweet. Don't use header wrap, it doesn't help when it's on a pickup truck, header wrap can also cause the headers to get to hot and cause them to crack and header wrap voids most companies warranty.