Well, let's see...
I think you are gonna need a new front tire. Although Plewsy might slap some silicone in those cracks and run it until it's bald.
What is going on with the inner primary? Is that a bead of silicone holding things together? Typical for a chain failure to rip that section out. My '66 had a repair in that area and I've seen quite a few more with the same repair. Is that piece glued in place?
The oddest thing are those front sliders? I've seen plenty of extended for legs (aka stanchions), but have never seen extended sliders. I assume you are going to remove the extended front end. You probably can still use the old stanchions if they are not all pitted. I assume if the slider are extended, you don't have to extend the legs. Hell, you can epoxy them like I did if you want to reuse them and save a few bucks. I can help you with that.
I wonder if those old extended sliders are worth anything. I've never seen them before. Anyone else familiar with them?
I have an original seat from I believe a '67 you could probably talk me out of for the right price. I don't remember any issues with it other than the logo being a bit faded.
I can also help you get set up to do you own zinc plating. That will save you a few bucks and help you with details that separate a decent bike from a really nice bike. I also have a bead blast cabinet and if you use stainless nuts and bolts for generall assembly instead of Whitworth, if you bead blast them, they are hard to tell from cad plate and never rust.
Dad looks a little forlorn over the bike leaving home. He's touchin it like a cowboy saying good bye to his old horse. I suspect he's happy you are taking it, but sad that another chapter in his life has ended.