??Distributor shaft depth in oil pump drive??

I know I am late but I had to check it out.
I do not think .090 is good.
The tip is approx. 1/4 " I have a pair of used distributor shafts and the wear pattern is one half of the tip. More like .170 to .190 Nice deburring of your block and looks to be clean. Also I like that you take blue printing of a motor to heart.
If you want photos I will do that for you. I would try a different oil pump drive first.