Shifting question

shim your shift rods so that they don't wiggle...that and a comp plus will have it shifting like a Porsche. A lot of the movement is rod deflection. It takes some time unless you have teeny weenie really flexible hands.
I have an assortment of shims and clips that I gathered to do mine.

It really works!

I did this as well. I thought I could improve upon the original Hurst/ pistol grip shifter in my 70 RR so bought a Competition plus. Turns out even back then (1972 'er so) Hust had QC problems. The new Comp Plus arms were sloppy on the shafts. I played with feeler gauges until I got a size that fit tight, then cut little short pieces and jammed them in between the rectangle on the shaft and the arm slots. The nuts held them captive.

That project was also why I was attempting to drill shift arms. The Comp Plus arms are different, bushed, while the factory ones were not bushed. I was trying to drill the factory arms, which fit tight, for the Comp Plus bushings.