410'

You should stick with 2.02 valves to keep some velocity and less shrouding. With that cam and compression ratio, 500 HP is going to be a stretch. I made 513 with 10:1 compression and a Comp CAms XE295HL an 1.65:1. Having a roller cam might make up some, but with .550 lift and 9.5:1 CR, I don't think you'll make it. .040 over won't be a problem. Mine's .060 over.