well actually, the 5.7 uses two parts(a/c compressor and something else)that the 3.4 uses, so actually it's probably more work to convert to 3.8

but that's if you don't convert the speedometer/trans/suspension

 

ok im just gona sell all the 3.8 stuff and i cant really find a good 3.4 that i want to put in i have several small blocks and would like to put my 400hp 400 in i know everybody say put in lt1 but i would rather have a oldschool carb engine and 350 trans what i really need to know is what will i need to make all my gauges work or would it be easeyer to get aftermarket