? about that 3.65” crank

I don’t want it, just wondering if a guy like you could find a Chevy piston that would work.

it would help the seller, or someone here

I'm sure. But by the time you find everything, you've eclipsed what it would cost for a stroker. I would love to help the seller too, he's a good dude, but that's the honest truth. That crank is for NASCAR stuff. With the 3.65 stroke and a 3.91 (318) bore, you get 350 cubic inches. The NASCAR limit is 358 cubes. So the rest can be made up with an over bore. There's not an off the shelf piston for that, unless I am mistaken.....and I could be. Mopar Performance "probably" made pistons for that combination back in the day when they actually supported us......but no more.