Boo, in your initial post, you mention a 250 block/292 crank combo not holding together too well. Why not? Is it just the long stroke, or what?
You could use small-block chevy rods which are plenty strong, the piston would only need a 1.39" compression height, which is definately reasonable, and would give a pretty light rotating assembley, especially compared to a stock 292 piston and rod!
I'm considering doing that. I've seen a few 292's around, but would rather keep the lighter 230/250 short-deck block and not have to debate storing/tossing the original 230 block from my '65 Nova.