This is just how I would approach it, not knowing the situation of your family obviously, I would use the opportunity to build my dad's personality into the project. Personally my father is of the #%&@ it, it's just money variety. So my build would bring that forward. Also with my father would be a lack of consideration for driveabilty, who cares, make it fast. So me personally, the build would go, 445, all forged rotating parts. Aftermarket heads without a doubt, I've fixed so many heads over the last 25 years, and currently don't own a factory cylinder head. I would then put a lumpy solid flat tappet, or solid roller, a single plane manifold, and probably an 850. Then I'd go beat the crap out of it, and say shoot, I should think about new disc brakes. But that's just kinda the approach taken at the Dickman households. Have fun with it, no matter what you do, that's a great piece of American history you have, for more reasons then 1.