3.8 heads on a 3.4?

[bonesbrakr]

Searched and didnt find any info on this so figured i would ask. has anyone tried or looked into this before? I am sure they have. With larger valves and bigger injectors seems like a logical upgrade but guess it wont bolt on the 3.4 block???? I saw all the threads about the Gen III heads and 3100 parts but i like to be different.

[UDLOSE98]

Re: 3.8 heads on a 3.4?

nope, not gonna work.

[lambo101]

Re: 3.8 heads on a 3.4?

No. 3400 and 3500 heads will though. Do a 3x00 swap. Eventually I plan on getting some 3500 heads, a 3500 lower intake, and 3400 upper intake, then having them ported and polished. Of course, don't forget to use 3400 pistons.