The Revell GTS is a pretty nice kit, except I could not get a good fit between the hood and the front fascia. The upside is that kit is plentiful and usually cheap. I bought three at Ollies for $8 a pop. If you want a roadster, the Revell SRT 10 went together nicely.
If your tools are not too dull, 400 and 1000 grit should work. 1000 is a little coarse for final honing of knives, but it should be OK for sprue cutters. You don't need them to be scalpel sharp. Keep in mind that if you take much off of the cutting edges, they may no longer meet. You may have to file the stop between the handles to get them closer together.
If you right click on the back arrow, you will see that a bunch of pages have loaded. You can go down that list and click on the page you want to go back to. Might be easier than closing and starting over.
I am so excited! As you can see from my avatar, I have wanted to build one of these for years. We own a '71, and I've been thinking about building a cab. I took a bunch of pictures and measurements, but you've done a much better job than I could do. I wish I had seen this thread when you started, I could have provided any reference pictures you needed. I hope this does get cast, I will certainly buy one. The Scout engine looks good, I hope it is the right size for the cab. Thanks for doing this!
Medium CA works well. Instant bond, and pretty strong. Usually if a joint fails, it's the balsa, not the glue. For extra strength, I would use yellow carpenter's glue, like Titebond. Probably stronger than epoxy for wood, and no mixing necessary. Some clamping might be required, but that's true for the epoxy as well. If it needs to be really strong, some joinery is in order.
I have been slowly pecking away at this thing. The chassis is done, and most of the cleanup for the bed, salt spreader, cab and interior. The next step is installing the opening doors, a first for me. We'll see if they end up glued shut. The tires are hollow and really thin, so I put a piece of foam pipe insulation inside each tire.
I can't offer any advice, but would like to add my condolences. It is a testament to your father's character that so many people who never met him, have tremendous respect and admiration for him. Like others, I only knew him through his words and pictures on a screen, but he was always generous and honest, and his models are of the highest quality. He also seemed to have a bit of a sneaky/wacky sense of humor. He made me laugh many times. He will be greatly missed, but always remembered.