Stall Speed Recommendation

More than likely you will have to chose if you want it setup for nitrous or NA. When I talked to PTC for my 8" I was on the fence about if I was going to spray it or not. The motor was fresh and had not been run yet, so I had no idea what it was capable of. They said that I should choose one way or the other for the optimal setup...I chose to have them set it up for NA. A few years later removed the nitrous system from the car because I never used it...the car hit all the ET goals I wanted without N2O.

My point being, be sure to give them as much info as possible to get a good match on the converter.