I'm gonna be running pretty close to your set up. Hughes cam about identical numbers just hydraulic not roller. Same headers. 11-1comp. Aluminum Indy w2 heads 2-10 intake 1-65 exh. Indy 360-1 single plane intake. The tall one. 850quick fuel. But sounds like I might be better going with a 950 carb. I have seen one other post where they lost almost 30hp going to an 850 from a 950. Also 3100 ft elevation