I have got a 350 that I am putting performer RPM heads on and wanted to switch out the stock cam for something with more power. I am running a dual plane intake with a holley econojet 650 (spreadbore holley) and stamped 1.5 rockers. I ran an 1104 in my 400/vortec heads and it got horrible MPG. I want a little more pep but at the same time want the best mileage possible. I preffer something that offers lower rpm power. what summit cam would you suggest?