Been down this road just recently. Not sure why you would want to run a stock balancer on a high performance engine with a roller cam in the first place unless it is a very mild hyd. roller for a mild street motor. Having a big roller cam (solid) I,too, opted for the Indy cast aluminum cover to support a cam thrust button. ATI offers a SFI balancer to fit with an Indy cast aluminum timing cover.Also, if you have an aftermarket crankshaft, you would be wise to mike the cranks balancer snout diameter accurately to furnish them with the rest of your relevent info. This is because a lot of aftermarket cranks come with snouts a little bigger in diameter than stock specs.If they build you a balancer, they can hone the ID to the correct size for your crank for about $40, ensuring ease of installation and the correct fit. ATI's tech dept. is very customer oriented and easy to deal with.I am very satisfied with this set-up.Give them a call, fast service,too. Good luck Bill