The original 1972 455HO I rebuilt for the "black car" that I later sold to BentwheelBob had the regular rod version of those high domed pistons. TRW part number 2394N. The engine had been rebuilt in the late 1970s or early 1980s with those crazy pistons. The engine made some great power but rattled so badly with preignition that the rod bearings were ruined from the shock. It didn't matter how high the octane race gas was I used even 110 - it just wouldn't burn smoothly and you could feel the engine trying to blow itself up.
When I rebuilt it I put the forged versions of the stock pistons in it and it would run on pump gas no problem. I ended up selling the domed pistons for a couple hundred bucks.
Here's some photos of the pistons.
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