Doing more research, the standard bore 292" piston is 3.875", with a .9273" pin diameter and a 2.009" compression height. The Silv-o-lite P/N 1429 has a "D' shaped head recess @ .300 deep. It was rated at 8:1 compression. It uses standard rings and a set is around $160.00.

~ Craig
1958 Viking 4400
"The Book of Thor"
Read the story in the DITY
1960 Chevrolet C10
"A Family Heirloom"
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'59 Apache 31, 327 V8 (0.030 over), Muncie M20 4 Speed, GM 10 Bolt Rear... long term project (30 years and counting)

If you don't like driving yourTruck, you won't drive yourTruck..| Living life in the SLOW lane