How much power do you have ???
Thius summer, with the thru-transom headers, I should pull 400HP without the Sniper nitrous plate (replaces the 75HP MMM setup from '79), another 100-150HP. Next year's porting on my heads (BBC open chamber '049's) with valve up-size should net me clost to 500 HP total according to the head shop that does DuaneHTP's. The nitrous will then drop to 100 (if not already there) and stay there. Close to 600 HP total by spring '07. My budget won't let me do stuff all at once.