pushrod plenum gasket evolution

[SappySE107]

First pic is the 3500 plenum gasket on the 3500 manifold that has black marker where the 3400 gasket would port out to. You can see how much bigger the plenum to lower intake can go with the metal gaskets

Second pic is of the gen 2 FWD, gen 3 small port, gen 3 large port, and gen 4 plenum gaskets. Last pic is the gen 3 and 4s stacked on top of each other.

I need the 3900 plenum gasket.

[blackbombshell95]

On the last pic is the Gen 3 gasket of a small port?

[SappySE107]

there is a small port on bottom, large port in the middle, and 3500 on top.

[robby1870]

Huh, interesting comparison. Newer ones are larger than I thought they were (compared to Gen 2).

[Rhedalert]

yeah!!!!!!!!!!!!!!!!!!!!!!!!!!

[Ortie666]

Thats really cool.. I would like to see the 3900 one with them all too,

[MidnightriderZ24]

wow. i never realized there was that much of a difference between 3400/3500 ports.

[torq455]

Ben, where did you get the paper gen II gasket? i have the metal O-ringed one on mine. i'd like the paper ones.

[SappySE107]

Victor reinz head gasket kit I think. I have had them for a while now. Got a set of metal gaskets to trade for them?

[Superdave]

my 93Z had those paper ones.. they were warped to hell when i pulled them out. looked like they wre blocking 1/4 of the port.

It runs much better with the new ones in there.. lol

[SE'sarecool2]

Can you get the metal 3500 plenum gaskets separately? Or do you have to get the whole top end gasket kit? Reason I ask is because the 3500 plenum gaskets I got from the dealer a while ago look like large port 3400 gaskets.

[torq455]

mmmyeah, never mind Ben