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Since the cam gear and oil pump shaft position remain unchanged relative to the oil galley and only the deck, heads or intake get surfaced 9 out 10 times lining up the oil galleys will get you where you need to be and then you use whatever shims or slip collar location you need to fit it.
What I usually do anymore on a new or different motor is take a 12†piece of wire straighten it and make a 90* bend about ¼†long in one end. Stick this down in the dist hole and hook the top edge of the oil galley hole then while holding it straight up mark the wire at the top of the intake surface where the dist sits. Now take the wire and transfer it to the distributor and set your slip collar or use shims so that with a gasket the top of the groove around the bottom of the distributor llines up with the marks on your wire. You can also do the same by pulling the rear galley plug and looking in through there to line it up. This way you have the oil galley lined up with the distributor for proper oiling and it should also set your dist gear to drive clearance where it needs to be. I will usually still check to make sure the dist doesn’t bottom out on the drive and that I have good drive engagement just to check if somebody put the right drive shaft in it
What I usually do anymore on a new or different motor is take a 12†piece of wire straighten it and make a 90* bend about ¼†long in one end. Stick this down in the dist hole and hook the top edge of the oil galley hole then while holding it straight up mark the wire at the top of the intake surface where the dist sits. Now take the wire and transfer it to the distributor and set your slip collar or use shims so that with a gasket the top of the groove around the bottom of the distributor llines up with the marks on your wire. You can also do the same by pulling the rear galley plug and looking in through there to line it up. This way you have the oil galley lined up with the distributor for proper oiling and it should also set your dist gear to drive clearance where it needs to be. I will usually still check to make sure the dist doesn’t bottom out on the drive and that I have good drive engagement just to check if somebody put the right drive shaft in it
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