Are L-134 engines and a F-134 from military Jeeps interchangable with the transmissions?
No, L-134 and F-134 engines are not directly interchangeable with their transmissions in military Jeeps. While they're both Willys Jeep engines, they have different bell housings, meaning the engine's connection point to the transmission is different. Therefore, the transmission from one will not bolt directly to the other engine. You would need to adapt the bellhousing or find a matching engine and transmission set.