What rockers do you plan to run? Pushrods? Installed hieght? All that combined with the life you expect out of your cam and valvetrain will need to be thought out thoroughly. If you want to push it, i have a 283/296/112 with .500 intake lobes and .460 exhaust sitting on my bench. I can send you a pic of the camcard

8..603 156 mph best, 2905 lbs 549, indy 572-13, alky