I bought my assembly for my 422 from Dram. Used K1 Chevy small end rods and K1 crank so there was zero grinding required to fit everything in the block. Also used Diamond flat top pistons. Best route if you ask me.

2013 NHRA D4 Stock Champ
#4 in the World IHRA Stock
2x IHRA Div.4 Stock Champ
14x Track Champ
All using a Ultimate Converter Concepts converter. Call Lenny today 704-892-6837