They are probably disappearing because there are so many better options out there and not that much more money.
Modern pistons will be lighter, stronger, tighter fit, better ring packs and full-floating option.
I wouldn't install a set of those heavy old TRW/Speed Pro slugs if you gave them to me!.......Cliff
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran!
https://cliffshighperformance.com/
73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
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