Custom 360 Cranks?

Yeah I get all that, just wondering what his build is to warrant such a nice crank
Completely valid question to ask. Doing a 1970 factory 360 block, 13.5:1 CR with a Racer Brown .738/.712 270-274 @ 50 & 107 LSA and the W9 heads/intake I bought from you a two years ago. The goal is 730 HP with no block fill.