I have a very similar combo with Source CNC heads and a Comp cam that's very similar. It's a solid roller with .575 lift and 262 duration, and 110 lobe separation. It drives beautifully on the street and has run 11.55 through the mufflers on sticky street tires. I do not have any power options, so vacuum isn't a big concern for me. Not sure how the vacuum operated items would like it, but it's a monster on the street. Good luck. What gears are you running, and do you have a loose converter? I am running 4.30's with a 3800 RPM converter. Tom