When I worked at Sports Car Craftsmen in Denver, we had a similar situation
with a Weber manifold and header on a bugeye. We had the Weber manifold
machined to the same thickness as the header flanges. Don't use my numbers
but in our case we had .080" taken off of the intake manifold. The
thicknesses vary by year or production run or something, just measure what
you need done and have a shop do it so that it is nice and smooth. It
shouldn't cost much and no worry about shims in the future.
James Nazarian
71B Tourer
71BGT V8
85 Dodge Ram
----- Original Message -----
From: Marc <smarc@abs.net>
To: <mgs@autox.team.net>
Sent: Sunday, March 23, 2003 4:10 PM
Subject: Vaccuum leak WAS: RE: Gasket orientation??
> Thanks to Jerry and David for the reply. I asked as I wasn't sure if I had
> done it correctly. I did, and my reasoning was sound! Anyway, I still have
a
> slight vacuum leak at the intake manifold even after replacing the gasket.
I
> also replaced all four manifold studs and nuts. This is a ZS to dual SU
> conversion. I note that the flanges on my intake are slightly thicker than
> those of the exhaust manifold. I cut a few washers to shim the difference,
> but the leak is still there. I could have the manifold belt-sanded to take
> off the difference, but I wonder if maybe my exhaust manifold (of unknown
> origin) is too thin...
>
> Anybody who's done this conversion come across (and solved) this issue?
>
>
> --
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