The heads are different but the blocks are the same. The heads will bolt up but that's about it. The cams aren't interchangeable between the 4.0 nitro heads vs the LX heads as far as I remember. Inertia does still over HO heads and 1.2v cams. I just recently bought both. I'm boosted and was told it would be best to do heads and cams last after all of my other mods. This is because your mods will grind the cams a little bit. SO I haven't received tem yet. been ordered for about three weeks. Its a bit pricey but well worth it. Just have a game plan. I kind of knew I wanted to be boosted/heads n cams when I first started.
ok, I've got the 4.0L cams. I see no reason they are not direct swapable. I've also discussed making a cam with WebCamshafts. If anyone is interested I would recommend calling them or email. Talk specifically to Melissa. I've already got a quote from them, and I think with enough interest we can get reasonable pricing on them. I am not sure they are clear about how many 3.5L engines are out there.
Anyway, here is where I am at. Cat back SRT dual exhaust, (leaving resonators in for now). Adding 4.0L cams (unless Melissa contacts me due to interest in a 3.5 Cam build), short pipe exhaust headers by BFC (which I have already ceramicoatedI will port the intake, and match the plenum, and also check the exhaust port mate to the headers and correct as necessary. Looking for a larger Throttle body or I will port the OEM. I am also going to flip the intake and build a air box and bring air in through the hood in front of the driver and add a dummy port to match on the passenger side. I may take/create more space by moving the coolant reservoir forward to where the air box currently is.
i will also likely deck my heads to increase compression, but I'd like to find a way to keep the cam timing advanced.
also looking to replace the upper coolant hose with stainless polished, and I will have heads intake manifold, plenum, timing cover and housing all painted/powder coated.
should be fun! Any other ideas I'm missing?