Who just bought one of these?

I have several cast crank 4"ers over 500hp, one at 550 plus 150 shot on cast cranks. I don't think it's the best for real long life, but they will survive decently if the car is a street/strip effort. Remember they are a better material and have a good radius on them. It's not like a factory cast crank. The SIR rods are nothing I'd use (just my opinion, I run stokers redone w/ARP bolts, or H beams), but the cast cranks are usually pretty good in terms of finish, and good past 500hp when internally balanced and good machining. IMO anyway.