Have anyone used Sealed Power Pistons and how do they compare to Keith Black Pistons. This will be use on a weekend street/strip car between 450-500Hp/Tq. It will be use in a SBC 406.
They are hyereutectic Skirt Coated Pistons with pins from Sealed Power (Part#: H616CP30). They are flat top pistons with 4 valve reliefs for 350 length 5.7" connecting rods - press fit. They require

5/64 X 5/64 X 3/16 piston rings

Give me somerecommendation
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DTL504

 

sounds like a stock replacement part or close to it, just like the KBs. they make good parts, but i've never used these pistons. watch the end gaps with hypers and don't use a power adder or let it detanate or they won't live for long.