Originally posted by gregaust
It sounds like maybe you could have the wrong distributor..
Just to explain,in the XD type black cleveland blocks the section of the dist shaft below the gear has diam of approx .487".....The early cleveland distributors have a shaft size of .513"....
Now if you're trying to fit an early dist you see why it wont go in..
This may not be the case but it might help out..
Yep, I finally found that that is the problem. Somehow I screwed up measuring shaft sizes plus the Ford w/shop manual for the XDs had the earlier size. This is wrong, as mines a '79 and its .487''.
Ohh well, its out to machine shop.