In my experience the pro shift box requires a quick hard shift no matter the rpm. On the other hand my face plated box can be driven lazy (shift hard and fast - crunch) or pay a little attention and speed match it like a dump truck. After several fluid experiments I have stuck with Redline MTL it seems to do the beet job cushion the face plates when you get out of the throttle and the slop is taken up.

I think getting the clutch to slip would help a lot. If you are going to beat on it go find a g force 101a 4 speed and call it good.

Way back in 2014 my 9310 face plated gear set was over $1400. If I was doing it over I'd have put the money towards a g force 101a. It is more cost effective starting with a race box instead od converting a 45 year old 4 speed tto male ot live.