63 Dodge Dart, now let me see;)

I felt I was quite meticulous of the 4 corners and how the rear main seal retainer goes using sealer. I did forget to put anything on the two bolts which hold the rear seal retainer:( If weather is nice or tolerable, I'll fire it back up tomorrow and see what gives. It's fun to hear it run anyway;) Thank you!

Oil leak is either the rear main seal or the oil pan gasket. Did you put a dab of RTV in each of the four corners where the cork meets the rubber end seals? Also, if the shop did not put sealer "of some kind" on the freeze plugs, they will leak. I use a thin layer of RTV and have never had one leak.