By removing the distributor and pouring oil through the hole in the head where the distributor was removed will send oil to the main bearings and cam. Pour in at least a quart or more , you can drain and change the oil later, right now, it is important to get some oil to the dry mains and cam. The distributor will only go back in one way because of the offset slot in the distributor shaft and you can't get it out of time unless you loosen and move the points cam. Good luck, it may not be all that difficult to get it turning. Twelve volts wont harm the starter, it will just give it more power. I have run unmodified model A starters on 12 volts for years. This will only be for a short time, anyway. I did this to unstick a stuck engine in a AA truck thjat I have.