426B & 452RB & 471B & 512 B & 522 RB currently underway

Dcuda69 said

If you're looking for pistons for the 470, Diamond can hook you up. That's what I used with 4.375 bore, 3.900 stroke with 6.760 Manley rod. I think they were listed as semi-custom with a little dish to match the chambers on the Edelbrock heads keeping CR at 10.2:1. Good luck with your build!!

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Thanks for the info, I have the 470 figured out 3.915 stroke 6.700 rods & 1.320 pistons, I bought srp pistons from JE.
The pistons I need to figure out is doing an offset "b" crank with 2.20 rod journals & 6.70 rods. I've done the math previously & I think it came out to 1.58 ch (assuming -.010 to square the deck) which there isn't an off the shelf piston. Come to think of it, I'd probably just do a stock stroke 400 with some more squeeze