I haven’t used one before, 505 stroker, little street, more strip use. 700hp.
OK, I'm not transmission expert, but what I'm reading is "super all out racing 727 big block transmission". I also looks like it has a "reverse lockout" which simply means you can't accidentally shift into reverse while drag racing (required in some race classes).
Also, I "think" it is a "reverse pattern" setup & I "think' that means instead of pulling the shifter all the way back into 1st gear, pushing forward into 2nd, then pushing forward into 3rd (drive), that you START OFF in the middle (1st gear is where drive would normally be), then pull BACK into 2nd and pull BACK into 3rd (drive is where 1st would normally be).
Somebody please correct me if I'm wrong on this. That would be extra insurance that you wouldn't accidentally shift into reverse (or neutral) while drag racing.
It does look like you have a "trans brake" so be careful with that. I believe it locks the transmission in 1st & reverse at the same time to hold the car still while you rev up the engine at the starting line. You hold a button down. When you let go....BANG! the car launches and HARD. If you hold the trans brake on for more than just a few seconds, I believe it can damage your transmission....so only while racing and don't stage early, wait for the other guy.
With this setup, I believe you do want a "2-step". That is sort of like a "dual rev limiter". "Rev limiter #1" is engaged by wiring it into your trans brake. That sets your launch rpm. You pull to the line, set the trans brake & floor the gas pedal. The car revs up to the "#1 rev limited rpm"....say 3000 rpm or something...but the car does not move (trans brake is on). With the gas pedal still floored, when you let of the trans brake button the car launches & rev limiter #1 is de-activated & that activates "rev limiter #2" which is your overall engine rev limit....say 6000 rpm or something.