l. If yours works so well than whats the worry.There are some having problems with geometry mismatching parts making 4spd cars.This artical is all about making it easier to shift at high rpms. But if your motor don't go up there you have nothing to worry about. And if you can shift it with a 5 1/4 throw at over 7000 , you are the man. I personally twist the livin **** out of everything I own. And it works for me. I also noticed its alot easier going in gear , also down shifting and reverse. It works for me. And I don't think Herb McCandless would would say it , if it wasn't true.