Before you pull the distributor shaft and drive gear pull the left valve cover.This will allow you to watch the valve movements on #1 cylinder.Rotate the engine to have #1 cylinder on the compression stroke(just after the intake valve closes)piston at TDC on harmonic balancer timing mark. Note distributor rotor position,it should be at the #1 cylinder tower,make a refrerence mark on the dist housing to the block as well.Pull the distributor and note the position of the slot in the intermediate shaft gear,it will probably be parallel with the cylinder banks but not necessarily.Pull the intermediate shaft by rotating it with a large screwdriver or long nose pliers.Prime your oil pump with a hex priming shaft while rotating the crankshaft slowly. When you are done priming rotate the engine to #1 cylinder TDC again watching the valve events.Reinstall the intermediate shaft to its original position,and then the distributor to the same noted position.Install the valve cover fire it up and adjust the timing. You may want to check or replace the fuel pump if it is a mechanical unit after having sat so long,you don't need fuel in the oil!
Good luck,RT