I just read all 11 pages of your terrific work. I've excited to see you drive it, and I hope you enjoy the fruits of your labor as much as I think you will. =]
One thing I saw that seemed odd was your solution to the radiator cap problem. Couldn't you have machined a new threaded hole that
would accept off-the-shelf caps, instead of making your own?
Oh well...
Congratulations on the work so far!