I really don't know what some people are thinking when they put those pistons in a "street engine".
I've pulled apart several HO's & found them inside......
You might consider milling/machining about 1/2 the dome off to achieve a 9.5 CR?
Goadhead455 (on the forums here) has had some good success (street & strip) with a similar 72 455 HO combo......)
Looks STOCK,runs REALLY fast.....
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Eye Candy......garage band?
https://www.youtube.com/watch?v=QUPcHxHRx3s
Go full screen & turn it UP!