1970 big block intake seals

[Nancy S.]

Looking for some information on the rounded tab on the intake seals. Thanks

[Joe L.]

Re: 1970 big block intake seals

Looking for some information on the rounded tab on the intake seals. Thanks

Nancy-----


Well, they say a picture is worth a thousand words, so here are 3 pictures that ought to be worth three thousand words.

These photos are from an NOS GM #3955528 gasket set which is an original 1969 L-88/ZL-1 gasket set. However, the end seals are identical to those used with a GM #3955526 gasket set used for 1970 LS-5 (I have some of those gasket sets too, but this one was easier to get at). Since I see you're new, I'll repeat my often-stated standard advice that none of the parts I have are for sale.

[Nancy S.]

Re: 1970 big block intake seals

Thank you so much for the pics. Because of the shape of the gasket does the "GM" stick out beyond the intake?

[Joe L.]

Re: 1970 big block intake seals

Thank you so much for the pics. Because of the shape of the gasket does the "GM" stick out beyond the intake?

Nancy-----


Yes, it does slightly---enough for someone to see it if they look very intently and carefully. This is one of those "trendy" features that draws a lot of judging attention. It ought to be worth about 0.01 raw points but I'm sure that, in current practice, it draws more than that.

[Nancy S.]

Re: 1970 big block intake seals

Does anyone know where to get the 70 LS5 GM intake seals, part # 3955526. Thanks

[Ronald L.]

Re: 1970 big block intake seals

Joe,
Is this seal the same as the 427 version that preceeded the 454 part?

[Joe L.]

Re: 1970 big block intake seals

Joe,
Is this seal the same as the 427 version that preceeded the 454 part?

Ronald-----


The 3955526 was first used for 1969 427's with oval port. It was later used for 1970 454's with oval port.

The 3955526 is NOT a "seal". It is an intake manifold gasket set which includes side gaskets (for 65-72 oval ports), end seals, and a distributor gasket. GM never sold the end seals for a big block as a separate part. They were only available as part of a complete intake gasket set. While the 65-72 side gaskets differed for different head and manifold configurations, the end seals were the same for all the sets.