[Scott68-93-97]

Originally Posted by BCOWANWHEELS

the 4 bt is a direct bolt in but you need a 400 th trans. a 350 th wont hold the torque of a 4bt. a 6 bt you have to fab engine mounts and go with a more h/d trans. as for the lame duramax yes they run good for a while but as you all know any engine with aluminum heads has problems with head gaskets. expansion rates are different and they start leaking then you run em low on coolant then crack heads & burn pistons. poor design for gm. you all know its made by isuzu dont ya for gm.

90% of all engines now of days are aluminum heads, most high performance heads are aluminum, even the new cummins is aluminum headed, this is not new technology, ford 5.0 have cast heads and lose cylinder heads like I fart, I agree with the dis-similar metals with heat but they figured those problems out 20 years ago with better castings and bolt locations to hold the 2 together properly, aluminum heads can also be repaired easier, there is nothing but benifits to them, next time never replace your stock cast iron intake with an aluminum one then, or dont run steel headers on your cast heads there different and expand at differnet temps. Also Cummins blow. My 93 6.5 with a turbo back only 3" exhaust and no other mods 1 ton, blows the doors off my buddy's 97 cummins that had an intercooler from the factory also a 1 ton. Heres your brain heres your brain on drugs. Any questions

BCOWANWHEELS much love for you man I'm just stating the facts.