Garry,
Yes, that helps a ton, thank you! I'm glad I'm thinking in somewhat the right direction. I understand the trade off with the velocity issue and figure if i can get on the low side of my displacement I shouldn't hurt velocity too much and can then fine tune with spacers if needed. I think i failed to mention this is a MPI set up, so there's no booster signal or anything to worry about and adding or removing spacers won't be as much of a chore.