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Re: viton valve seals?
I can tell you that my '79 L-82 Corvette needed to have the heads machined, in order to accept the new viton seals, so it had to be after that that they changed to the newer style head.
I had my heads done in '97, so I don't remember the part number, sorry.
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Fred
1974 C-20 Fleetside
White/Crimson Red
292/SM465
4.10:1 open
1976 AMC/Jeep CJ-5
Lime Green
258/T150
3.54:1 open
1972 C10 Suburban - SOLD
White/Medium Spruce Metallic/White
Avocado Highlander Pkg
402/TH400
3.08:1 open
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