Head gasket choice

[Badassoldspower]

What headgaskets should i use on my 3400 with 3500 upper end? Im talking to keep the C/R same as stock or a little higher, but without risk of mechanical failure.

[19Cutlass94]

If I remember correctly, the MLS head gaskets would probably be the best choice. I didnt see them in the store so Im not sure if they are just out of stock or not listed ot not sold?

[Superdave]

you can use either the 3400 or 3500 headgaskets. they're both .060" thick. the 3500 one is a tad larger so you'll lose very little SCR.

there is no need for MLS gaskets on a N/A or lightly boosted engine.

[ikessky]

I'm planning on going with Fel-Pro PermaTorque SD head gaskets on my 3100.

[grandam3400]

I'm planning on going with Fel-Pro PermaTorque SD head gaskets on my 3100.

Do you have a part#?

[merlot566jka]

i like iron head gaskets, never had a faliure and bumps compression

[IsaacHayes]

Iron head gaskets though brings the piston very close to the head and reduces quench. The pistons come out of the block on gen3 motors.

[merlot566jka]

so those head gaskets and a turbo would be no bueno??

[SappySE107]

Yeah, you dont want iron head gaskets on a 3100/3400/3500 piston. The HD felpro gasket doesn't exist for the 3400, only 3100.

[merlot566jka]

so whats going to happen if i use the iron head gasket on the 3500?? ive been using it for a while and have had no head gasket problems

[SappySE107]

what is the peak rpm you go to?

[merlot566jka]

revlimiter at 7012

[zofo61]

So if I have a 3400 bottom/3500 top and 8-12 lbs of boost.....what is the best head gasket to use?

[merlot566jka]

3400

[IsaacHayes]

2003+ I think is the year GM went to graphite head gaskets on the 3400's.