So did you use a hydraulic clutch linkage? I see dual belts on the alternator. Nice. That 327 has a lot of room in there.
I got a used ebay balancer for the six today but it was wrong. It was a single groove. Looked like a 2 groove in the picture. Sent it back. I'm going to try to modify one from a 250 like Hotrod Lincoln suggested. I can use small spacers on the brackets if I need to align the pulleys. I want to get the truck going as simply as I can for now. I think a v8 may be in the future.
I can't decide if the brake master should go under the floor with the integral reservoir, under with a remote, or on the firewall. I like the way you did it. Firewall is sure accessible for bleeding and checking fluid levels.
I need to get after the wheel cylinders and look at the shoes. I haven't even tried to get them apart yet. The parking brake shoes need to be relined and the linkage gone through too.