What Parts Interchange from 3.1 to 3100 or 3400?

[95oldsVan]

I mainly mean intake manifold and heads.For example,will the older 3.1 intake manifold bolt up to a 3100 or 3400?

 

Or will the later heads/intake manifold fit on the earlier 3.1 block? Was just curious,not planning anything to swap out or etc.Just looking for knowldege.

 

Thanks.

[cutlassdude96]

you can put 3x00 heads and intake on the 3.1 but not the other why around

[Guest donkeykongrape]

out of curiosity, would anyone happen to know how much power a 3400 heads on top of a 3.1 block would put out? I mean...it's not a 3100, it's not a 3400...it's...both

[THe_DeTAiL3R]

The 3400 heads are the same as 3100 heads, same goes for the intake (except for the upper which has says "3400"). I would expect a 15-20hp gain with a newer 3100 or 3400 top end swap.

[fastbird232]

I thought only the 2000+ 3100 heads and intake were the same as their 3400 counterparts?