I am going to go out on a limb with my imagination here. :
1. That stroke is similar to the SBC 350.
2. People here, including me have purchased connecting rods for mopar cranks with the chevy wrist pin size on the small end. This could open up some piston options, like for example the 327 chevy piston which has a similar compression height to the mopar 360 piston (now both engines would have the same rod length. Chevy pistons would give you a chance of many options. The way the valves lower is a consideration regarding piston selection while thinking of valve reliefs and valves contacting pistons.
3. that leaves either a late 60's early 70's 318 block bored all the way out .090" or maybe a 327 + .040" or + .060" piston with a 340 block.
4. Additionally, allot of enthusiasts have purchased LOW DECK R Blocks where a crankshaft such as this would be much more optimal in any attempt to match rotating assembly length to block height.
Good luck and GOD bless
