I have a 8v71 Detroit engine in a 1966 mci5a. This engine was rebuilt under previous ownership. The coach was converted but by my estimation the engine has hardly seen any use. I drove the coach from CT to VT and she ran perfectly. I only bought the coach for parts and am now seeking a buyer for the engine. It is still installed and you can hear and see it run. Hard to believe its really a Detroit when they don't leak any oil!