I thought u only start retarding after a 100 shot, if im wrong correct me. Plus the kit im buying is the safest on the market, if it senses im going lean or an unsafe condition it stops injecting and if alls good it sprays away. I dont have a 2step either i have to hold the rpm steady by foot which sucks but i will get over it. im looking at clutches and flywheels right now. Im trying to find an 8 or 9 pounder. Even with the ls trans if i can get it to rev faster then it wont b as bad.