500 hp 360 ??

Ditch the hydraulic flat tappet for a solid flat tappet. Do you already have the rockers or are you buying them. If you don't already have them, get a set of Hughes rockers much better IMO. 360 rods are good rods, but here is the thing. By the time you clean em up / press off old pistons, magnaflux em, put in ARP bolts, resize em, maybe polish the beams, and balance em. You're in em damn near as much as a set of lighter, stronger, full floating, NEW ( not stressed out from years of use ) 4340 steel aftermarket rods. I like the SCAT I beams http://www.summitracing.com/parts/sca-26123 .