On Sat, 23 Nov 2002 07:47:25 -0700, you wrote:
>
>oletrucks-digest Saturday, November 23 2002 Volume 02 : Number 1789
>
>Subject: RE: [oletrucks] GMC V8 pistons
>
>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.
>
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Tell him to call Lester Harris in Minden NV at 775-267-2559. He
specializes in vintage engine and chassis parts and supplies many of
the "big-name" vendors. One of them is Egge Machine, which should be
his next stop after Lester. http://www.egge.com/ They manufacture many
pistons, and will certainly have good information for him.
If the only difference between the pistons is the dish, and the flat
pistons are available, a *good* auto machine shop should be able to
machine the flattop pistons into dished pistons.
Joe
--
Heather & Joe Way
Sierra Specialty Automotive
Brake cylinders sleeved with brass
Delco alternator One-Wire conversions
http://www.brakecylinder.com
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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