Scout should have an IH 304, 345, or 392 V8. They’re all basically the same and the same engines were used in buses and medium duty trucks like dump trucks, as well as stationary equipment like irrigation pumps. The IHs used Dana axles in both ends, 77 should be D44s. Auto transmissions were Chrysler 727s IIRC. Look for rust in the rockers and more importantly the door jambs.
My neighbor growing up was/is a Scout guy and has a 75 Scout II and an 80 Traveler. Pretty neat rigs.
