On your deal your way safer running 3 to 6 lbs. at max RPM to start with on tuning it on pump fuel I would screw in a set of Auolite 3932 or AR63, if you want the to run the extended gap plug with the blower I was taught to run a retracted gap plug on any motor under boost Good luck, don't get greedy on the power
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
I was taught to run a retracted gap plug on any motor under boost 
