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Old August 4th, 2021, 06:45 PM
Prowbar Prowbar is offline
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Join Date: Dec 2020
Location: Friesland, the Netherlands
Truck: 1965 GMC 1500, 305E, SM420
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Prowbar will become famous soon enough
Default High compression pistons

Have read here and there that the 305C's used in forklifts for propane use, and the V12's for irrigation that ran on natural gas came with different, taller pistons that raised the compression from 7.5:1 to around 9:1. Does anyone have a picture of these so called high compression pistons?

Would be interesting to see; also a nice upgrade for an existing gasoline engine.
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