I think that Bill is referring to the two different piston crowns. 4 and 5 have dished pistons, while #6 if flat.
At least it sure looks that way.
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Last edited by klhansen; 01/16/2024 1:22 AM.
Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.