however..This is way to much...
Just stick the gear on there [it's square enough] and use the existing hole as a guide to drill through the other side, use washers if it has some vertical play.
Heck I've even redrilled a new hole lower as to take up a lil end play I had, I just drilled one @3 0'clock an lower than the original hole.
Say....how many gear teeth are on the distributor gear again??
Done.