Looks like 11.5 to one or maybe even 12 to one compression. I picked up 4 miles an hours last year on one compression point. These are one over last year. Cross fingers. These are 60 years old and have to be ground in the old time way to fit. Crazy stuff. Thanks Gordon. .
A piston with a crown that is only 1/8" wide at its tallest point is a bad ass piston. Its like a spear!
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