Ok, for the General Motors Performance Manual Control Shift Kit, Four Speed Automatic Transmision, Is there any visual difference i.e. 1,2,3,4 vs 1,2,D,OD? Second, what is teh difference between the Pro street, and the Pro competition, and what would be the best choice for a stock 91 z28 305? Third, Do you still have to let off the throttle to shift, or can you actually keep your foot in it and just move it up a notch?

Thanks for your time