The first road block you will run into is finding pistons. No one is making cast pistons. They are available, but the price for a set of cast pistons is close to $400. Then if you machine off some of the dome to lower the compression, you could almost have a set of forged pistons made. My 425 project is on hold for that very reason. I have everything else, but can't get past the cost of custom forged piston.
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Steve B.
GSCA #2173 (1986)
67 GS 525 Stg IV
66 GS Convertible
65 GS HT
63 Riv
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