Sodak65,
As you may have noticed, we like our nailheads.
Don't let that keep you from participating here, still a lot of good info and help. Not to mention sources for parts.
I think the headers may be the hardest parts to find. A friend of mine has the 455/turbo 400 set up in his '65GS. So I could find out what you would need for a radiator. I had built the wiring harness for that engine and converted it to an internal regulator for the alternator. It's all doable, just keep at it.
Good luck, welcome aboard and don't be afraid to ask questions.
Loren