Yea, do talk to Rob. He's at Advanced Clutches, find him at
www.advancedclutches.com. He had the baddest Boss 351 ever seen. The specs on this engine are outrageous. It wouldn't cost much more to build a 351 Boss than a 351 CJ. Bearing life is an issue if pushing the engine to the extreme. Stick only combo but who would want an auto behind and Clevland?
And Vic G. is also offering good advice on the 429 SCJ. Pick your poison!