Seen a lot of these 92. Super 92. 82s. Simple engine change. Take right wheel off. Disconnect everything. Slide Chrysler flat 6 engine out (on angle iron slides). Slide rebuild engine back in. Mechanic could do it all quickly. Popular combines in their day. Custom combiners liked them. Low profile. Could clear most bridges back in the 50s and 60s. Plus a good reliable machine.
At least you're saving these classic combines from the scrapp heap. My late father had a Massey 585 combine and that machine lasted right up until the early 1980s.