500 vs 512 from 400ci

Respectfully, you cannot use long-term and stock block 1100HP in the same context. I like a longer rod because it stresses the bore walls less. If you gusset-up and make the main area better, may as well reinforce the cylinder walls AT THE SAME TIME. Sonic check and either filling or sleeving anything questionable. Set the bore to where you can get GOOD THIN rings.
What rings would you recommend in this?