Rebuilding a 340

Hypers are fine, never had a problem with them. The 645 rods (340/360) are more than fine for a stout street/strip engine. Do the bowl work, no down side to that mod and cheap if you do it yourself... and you can.. an easy 40 h.p. (20 CFM) . Pick up a set of adjustable rockers..necessary no..but better to have them. Irish, your last decision should be the camshaft. Choose wisely. Terry.