I love those old Roadmasters.I would agree to mock up everything you can before you make anything permanent. It seems like progress when you weld up something permanent and paint it up nice. However it is not fun to cut it all apart again later to redo it. I've been down that road alot. I am doing my final assembly now and I am still dealing with things I should have made different. But after the entire vehicle is painted, you have less options.