Your setup sounds similar to mine. Building a 417 SB with closed chamber W2's. My priority was pump gas as well as power for the rebuild. So I left all that up to the guys that do this for a living. Ended up with 11:1 static and somewhere around 8:1 (I think) dynamic. Cam is a comp roller with around 268 duration @.050 and .650" lift with 106 or 107 LSA. But anyhow, we only get 91 around here and the engine builder gave no doubt that it will run pump gas. BUT, that means I'll be pulling back some timing and losing some power on 91. Throw some race fuel in and advance the timing, it will pick up a few more ponies. So it's a trade off. I think it's a good one IMO since this will be both a street and track car and I won't have to run straight race fuel around town like I used to.