Good to know! I had wondered how it would effect the distributor since it meets in the front of the cam and to the side. I didn't have my engine nearby to look it over and think a little harder! I will probably still shim it just for piece of mind, while researching all of this I've learned that timing can be changed 1 degree for every 13 thousandths of end play. This is assuming it moves up and down, which it isn't going to be constantly doing. However, they pointed out worn timing chains can slap and cause that effect as well. I know our sixes don't have chains either but if it won't cause me any harm but will give me a little piece of mind, I'll go for it.
