Off set crank grinding

The only problem I see in making use of the OE piston IF it could make the distance close to the deck would be valve contact. The number 1w&c gave works out to be .0625 added to the throw up top. So, if a stock slug is down .080 in the hole.... .0175 is left up top.

OK, the calc numbers are loose. We know this. (Right?!?!)

It maybe possible to use the customized Chevy slugs designed for there 18* head conversion. You know the heads... The ones that they pay dearly for in a copy cat attempt.
Off hand, I do not know of a low compression slug that has valve reliefs that maybe deep enough to use.

Another thing comes to mind. How far can you go with slugs NOT designed for this. As in OE slugs or after market units skirt length? More food for thought my freinds.