Toyota spindles?

Not really. Loads of cars, even foreign ones used 5x4.50" (114.3mm). Some were 5x100mm, which is very close to the 4".
That's right. I have used Toyota wheels on my Plymouth. Some Ford wheels also work. 5 on 4.5 " bolt pattern. I also have a Powerglide tranny and a Ford 9 inch rear end in my race only 68 Valiant. Seems wrong, but whatever works! LOL