Hello, last night i picked up a partially disassembled Hydra Mac 8b, the engine is freshly rebuilt, but the starter was apparently lost at some point in the project.. In my looking for a replacement, everything seems to be showing 1979 and newer for the currently available Onan NHC starters, and i believe this skid steer was built in 1973. Does anybody happen to know if the starters are interchangeable?