400/450 stroker....Cheap parts, lotta work.

Cody and I have done some strange things with those rockers. In 2007 or 08 we used them on a 7.5:1 compression, stock rod, cast piston, 383 that made 525 HP at 8,000 rpm on the Westech Performance Group dyno in Mira Loma. It was the same day our '71 Road Runner with a pump gas 451 made 554 RWHP on the chassis dyno there. My boys and I were dashing back and forth between the engine dyno and chassis dyno wearing out our track shoes.