Finally finished it, well as finished as it will ever get. I just found a nice original vinyl-acetate coated stock for it and 2 position receiver extension, and am calling it done.
Its not 100% accurate, but it has enough vintage touches that I'm happy with it. The lower is a Colt A2-marked large pin and it has a 10.5" Olympic barrel with repro moderator.
Its a smile-maker at the range too... my son has decided that its his now.