Everybody: I found the problem- it was the brakes !
I noticed my right rear wheel got very hot after a short drive. After removing that drum, I found that the wheel cylinder was sticking open, causing the brake shoes to drag. This caused the car to be very difficult to turn left. Sort of like those dune buggies with the separate rear brake handles to assist turning.
I couldn't find any issue with the cylinder, as when I opened up the bleed valve, the cylinder retracted properly. The real issue was the rubber brake tubing that connects to the metal brake lines. These were very old and collapsed over time. They would pass brake fluid OUT because of the high pressure from stepping on the brakes, but would not allow the fluid to come back IN, hence locking the brakes on. Replacing the rubber lines fixed this problem, and the 'hard to turn left' problem completely. THe car also has more apparent power without the brakes being constantly on !