Installing
You may want to check the position of the distibutor vertically relative the the passenger side oil galley.
Mark the part of the distributor housing that helps form the oil path thru the galley with bright red marker and install it. Then remove the passenger rear oil galley 1/4" plug and verify that it is lined up.
If it is not aligned, the oil will not flow correctly to that side of the valve train.
It can also cause an internal oil leak.
If it is aligned then the gear mesh should be correct.
There are .006" oversize gears made also.
If vertical height needs to be changed, the preferred way is to use a distributor with a slip color like MSD 85561.