[Bruce of MN]

One time I noticed that the points gap on the distributor was varying. While adjusting one time, I observed that the upper plate was moving slightly. A mere .001” is important here, so I investigated closer. I swapped distributors after checking the backup one for similar movement; it was OK. With the cam and spring removed from the first dizzy, the upper plate was definitely moving. I decided to “spread” it to fit better in the dizzy body. I mashed the tangs on the perimeter with a ¼” flat end punch on the anvil portion of my vise until it was snug, but could rotate smoothly. The tangs spread nicely and the job ended up cheaper than a new plate that might have also been loose anyway.