If your using it for drag racing and have an override trans hit the switch right after you launch out of the hole...If you have a normal trans I would hit it around 3rd gear...If you run a small shot you should have no issues and it should run for a long time....I would reccomend tz bearings and a welded crank...I currently have a NOS setup for sale with everything from the carbs to the all the brackets...PM if interested...Oh yea one more thing about nitrous....HOLD ON! lol