Not sure if this is the right place to post this. Having dist gear issues and wondering how I should proceed. Engine in restored car, 1969 390 previously rebuilt by a prior owner (2002?) with few miles and I don't know what parts were used other than new Venolia pistons and Comp roller tip rockers. When I pulled msd distributor gear was chewed. Noticed when I cranked engine and tried to pull distributor it would bind at a certain spot and not on the rest. Used dial indicator and found cam gear was out of round. (maybe normal?) Ordered matched set of gears from Bulltear. Used dial indicator and cam gear now seemed to be within specs. Installed those on a NOS AMC distributor and put into the car. Ran 100 miles and same thing. Distributor gear has one tooth that has no wear but lots of wear on the rest. Again distributor would bind very hard on one area but when engine turned more became loose. Timing cover does not have AMC part number. I have access to used AMC parts however am not adverse to buying new to not have this reoccur. I was going to try turning the pump and see if I can see oil moving around through the fuel pump hole and if so take the pump off and see if the distributor now goes in easily. Before I do anything I thought I would get some opinions as it seems many people have had this problem.
I can see two possible avenues to take.
1)Check for oil getting to the dist gears, take the front cover off and replace with either used AMC after checking clearances or Bulltear, check the timing gear to make sure it's either an AMC one or that it has the proper oil passages, check oil pump gears or put new ones, change the cam and dist gears to either new Bulltear again or used AMC, change oil filter and oil and put magnetic drain plug. This should rule out the dist, cam gear, timing gear, front cover and oil pump but will not address any cam oiling issues, if the rear cam plus was inserted to far in or any damage that may have been done. It can all be done with engine in the car which is my preference.
2) Take the engine out, check all the above plus the cam and all the bearings.
Any ideas would be greatly appreciated.