I had already suggested Kanter's to him, but he said that Kanter's told him the
pistons were the same for the GMC and Pontiac 347. At that point he asked if
the pistons for the Pontiac were the high (10.25:1) or low (8.5:1) compression
ratio and Kanter's replied that they were flat top.
I believe that the GMC (and probably the low compression Pontiac) pistons were
dished to get the lower compression. I know that the 7.6:1 compression ratio
GMC V8 and the 10.25:1 Pontiac used the same head casting, so they must have
dished the pistons to reduce the ratio.
Any comment Rick?
-----Original Message-----
From: Joe Garcia [mailto:chevy1@jps.net]
Sent: Friday, November 22, 2002 9:14 AM
To: Hanlon, Bill (ISS Houston); Old Trucks List
Subject: Re: [oletrucks] GMC V8 pistons
www.kanter.com/ shows everything to build the 347
Joe
----- Original Message -----
From: "Hanlon, Bill (ISS Houston)" <Bill.Hanlon@hp.com>
To: "Old Trucks List" <oletrucks@autox.team.net>
Sent: Friday, November 22, 2002 5:52 AM
Subject: [oletrucks] GMC V8 pistons
> Anyone know where one can buy pistons for a 57 GMC 347" V8? Or even a
> 57 Pontiac 347" V8?
> If Pontiac, they would need to be the low compression (8.5:1) pistons,
> not the high compression (10.25:1) pistons.
>
> Stock piston (including pin and keepers) is GM part # 2371412. Of
> course this was 1957 only because 347 V8 was only 1957. Picture in the
> shop manual shows them dished.
>
> A guy on a old Pontiac discussion group wants to know. I sent him
> sign-up instructions to this list.
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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