360 Re-Ring? Temporary Engine. Will it run fer a year?

Disassembly will tell you a lot. If it ran fine, I would just leave it alone and use it as is and spend your money on the new engine/car. If you can, try to compression test it, I think you can outside of the car, just need to turn it over with the starter because by hand will not work. Every high mileage Iron ring engine I've ever disassembled, regardless of maintenance, had a ring ridge in the bores.