273 forged pistons

Back in the day I rebuilt my 273 with Sil-Vo-Lite (sp?) cast 4 bbl replacement pistons. They weren't even specific to the 2 sides of the engine. Each had a sort of "pent roof" shaped dome. Not sure what you consider running an engine hard, but my engine took quite a bit of abuse. Hard launches, 6000 rpm shifts, even saw 7000 rpm once. Never gave me any problems.