Got the new pistons from Summit on Friday...a sealed box with the label "matched weight set." They are at the machine shop now. When I dropped them off, the block was finished but I was in the wife's car and she doesn't take too kindly to transporting engine blocks in her trunk.
Over the weekend I spent some time painting the frame, cleaning all the brake and fuel lines and then reinstalling the lines, brackets, wiper motor, steering box, intermediate column, new motor mounts, etc. I also cleaned and rewrapped the wiring harnesses, too. (And yes, the factory did use bright white, corrugated plastic tubing to contain the firewall engine harness on the 75 Firebirds - not too esthetically pleasing, I'd say, but it is original!)
Waiting for a couple new brake hoses to arrive tomorrow. I had to replace the calipers after snapping the bleeder off one in an attempt to get it ready for bleeding the brakes. Figured I should replace the hoses as well, just to be safe.
Here's the engine compartment at the moment: