Did you look at that video link I sent? I watched them do the front header 100 times I bet. Mine is finished a lot like that one but I didn't use the welting strip like they did. I Didn't think I needed it, still don't.
The P.O. painted it back in 1980 along with the 455 transplant. Its been garaged ever since. I have no idea what this color is, but it was originally April Gold.