Was just browsing your thread and noticed your brake shoes are swapped back to front incorrectly. My understanding, though there seems to be some debate, is that the brake shoe with the larger/longer friction surface goes toward the rear of the vehicle. My father-in-law was GM factory trained and insists that's the proper way. Might read up on that and decide for yourself
I'm impressed with what you can do without having parts at your fingertips. I get impatient just having to wait for parts to come the next day from 100 miles away.