what rpm should I shift at with nitrous? on motor, I shift at 6800-7000 rpm. using a cheater system with 125hp jetting, max jetting is 175hp. 302, filled block, HD main caps, studs throughout.scat rods,tfs 3 hyd roller cam, world sr heads (290 cfm @ .600") funnelweb, 650 dp, c-4 w/4000 stall/4.30 gear, strange axles w/spool.3150 lbs with me(265lbs)