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I just looked at NHRA blueprint for a 1970 440HP , ....and the blueprint spec is .051 in the hole. ....

Anyone have an ACTUAL 1970 440HP std. bore CHRYSLER ORIGINAL piston they can measure the CH of , I would really like to know what it is ?

THANKS

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I think your number is pretty close.

I've never measured one, but I think I saw a post on here where someone had.

I measured a virgin 67 hp engine and found that they were about .070 in the hole.

Since 67 had closed heads, the newer ones would have needed to be a little higher to maintain any kind of decent compression with the open 906 heads