[70 ls6 convert]

well its winter time and im working on my camaro project,im going to be doing mostly racing ,ive got like 3 major questions i bought one of those new gm zl1 blocks,what would be the best rotating asy 454 or 427 , the best all around cam and what kind of traction control on the rear end ,its a stock 12 bolt rear end with the stock springs and its a 4 sp ,i really want a super reliable car i can enjoy racing and kicking but on the compatition,thanks so much for the help and happy new year kris...