I have an 70% complete Lycoming O-235-4 (100 hp) engine. I am assuming this was a military engine as most military engines used the dash (-) numeral in the model number rather than a dash (-) letter. This engine is also unusual for a Lycoming as the the starter and generator are rear mounted on the accessory case.
QUESTION; which military aircraft used this engine ? I thought it might have been the Navy AE-1 or HE-1 Piper J-5 variants. However the TCDS sheet only references the O-235-B engine.
Any thoughts ??