The old TRW's that we would dish had a massive amount of meat in the piston top and we could remove a quarter inch and there was still a very safe amount of aluminum left. Modern piston design just doesn't have any excess thickness at all. Flip the Ross piston over and note that the bottom contour follows the eyebrows and is consistently thin. The underside of the old TRW's was as flat as the top.
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Mick Batson
1967 original owner Tyro Blue/black top 4-speed HO GTO with all the original parts stored safely away -- 1965 2+2 survivor AC auto -- 1965 Catalina Safari Wagon in progress.
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