Proform Adjustable Pinion Snubber

I used the old Herb McCandless style that used the pin on my 71 BB Scamp. I had to because the spring wrap was so bad it dented the front of the shocks when I launched the car. And I was using 002/003 SS springs. Car hooked real hard 1.40 60 ft and ran 6.30's in the 1/8.