The welded stock crank 4.15/LY/Ross piston combo is still alive and well in my Mirada. I did run the heavy 400 slugs for one year with home ported 906 heads. Ran low 11's with a MP .557 cam.

Same short block with Ross pistons, Stage VI heads, UD NF69 cam has gone a best of 10.04 @ 135.