327-intake manifold gaskets

[Don M.]

Guys, I have to replace my intake manifold gaskets on my 64 327-365hp engine. Where can I find the NCRS Correct intake manifold gaskets??? I guess I will also ask, what is it that appears on a correct gasket? How will I know when I have the correct ones?

[Joe L.]

Re: 327-intake manifold gaskets

Guys, I have to replace my intake manifold gaskets on my 64 327-365hp engine. Where can I find the NCRS Correct intake manifold gaskets??? I guess I will also ask, what is it that appears on a correct gasket? How will I know when I have the correct ones?

Don------


The closest you can get in a reproduction gasket set is the set reproduced by Paragon. This is an embossed type gasket set, as original, and has the externally visible "features" that the original gaskets had. There may be nuance differences, though.

One other "feature" that will be missing is the tiny "GM" embossment on the end seal "flaps". I think this is a judging "focus". In the scheme of things, it ought to be worth about 0.05 judging points, but I don't think deductions of less than "1" are taken.

In any event, other than real old NOS, you won't find a more accurate reproduction.

[Philip C.]

Re: 327-intake manifold gaskets

I'd try Long Island Corvette they are always in stock and ship out same day 1-800-466-6367 Phil 8063

[John D.]

Re: 327-intake manifold gaskets

Don, As far as the repros go they are not really a repro per say. Just recut Fel-Pros. WHen you buy them the camel hump has a verticle rib in it. Flatten the verticle rib in a vise or whatever it takes.
No subsitute for the end rubbers that say GM though. They are getting rare and are big bucks. The GM logo came in at least two fonts. Large and small. DOn't know which is correct for a 63 and doubt if many do. Use whatever size GM logo you can find.
The judges do look for this though.
Watch ebay for real deal.
If you are wondering why no one reproduces the correct rubbers it's because they probably would never break even as there aren't that many nut cases like us that care.
It's very expensive making rubber parts. JD

[Joe L.]

Re: 327-intake manifold gaskets

If you are wondering why no one reproduces the correct rubbers it's because they probably would never break even as there aren't that many nut cases like us that care.
It's very expensive making rubber parts. JD

JD------


I expect that the main reason that no one reproduces a gasket set with the correct end seals is that it would require a GM license to do so. In this case, they can manufacture a 99.5% correct gasket set without needing a GM license. To get that last 0.5% correct, they'd need the GM license and the cost implications that go with it. They probably figure it's just not worth it and I would agree.

[Bernie M.]

Re: 327-intake manifold gaskets

ihave the large ones with gm on them bernie bjmyers@ciaccess.com

[Dave S.]

Re: 327-intake manifold gaskets

JD------


I expect that the main reason that no one reproduces a gasket set with the correct end seals is that it would require a GM license to do so. In this case, they can manufacture a 99.5% correct gasket set without needing a GM license. To get that last 0.5% correct, they'd need the GM license and the cost implications that go with it. They probably figure it's just not worth it and I would agree.

Attached is a photo of the GM logo. These are from a complete gasket set dated 1957.

[Mike M.]

Re: 327-intake manifold gaskets

Attached is a photo of the GM logo. These are from a complete gasket set dated 1957.

dave: unusual in that the front seal has the large GM logo and the rear seal has the small GM logo. did the pair come out of the same package?regards,mike

[Dave S.]

Re: 327-intake manifold gaskets

dave: unusual in that the front seal has the large GM logo and the rear seal has the small GM logo. did the pair come out of the same package?regards,mike

Mike,
I thought the same. They were in the same black and yellow envelope as attached. The envelope was open but everything was inside except the round distributor gasket. Can't say for sure but the odds are good that they came that way.

[Gene M.]

Re: 327-intake manifold gaskets

Dave,
Is the intake gasket in your GM set a paper gasket or laminated composition gasket?

[Dave S.]

Re: 327-intake manifold gaskets

Dave,
Is the intake gasket in your GM set a paper gasket or laminated composition gasket?

Gene,
I assume you are asking about the intake side rail gaskets. I've never seen anything like a paper gasket used there but these originals are some sort of laminated composition material with a metal or copper core. The end gaskets are of course rubber.

[Joe L.]

Re: 327-intake manifold gaskets

Gene,
I assume you are asking about the intake side rail gaskets. I've never seen anything like a paper gasket used there but these originals are some sort of laminated composition material with a metal or copper core. The end gaskets are of course rubber.

Dave-----


Yes, as far as side rail gaskets are concerned, I am not aware that GM ever used anything but the EMBOSSED-type gasket for small blocks, at least through about the early 1980's. This type gasket has a steel core with a composition-like material "bonded" over the core. This material has raised (hence the term "embossed") ridges around all of the port and coolant passages. These flatten to provide more positive sealing when the gasket is compressed when installed.

Your gasket set, GM #3742241, was originally used only for 1957 engines, although it was available through most of 1958. It was discontinued and replaced by GM #3752758 in August, 1958.