You would probably have to drill new holes to mount the motor. The 316 with the K341 has the motor mounted in a cradle that is sitting on rubber isolators, the Onan versions mount on a plate attached to the frame. The early 316K (which I have) are known as closed frame tractors, the later Onan ones are known as open frame. The way you can tell is by looking at the rear frame, the early ones have a plate across the back, the later ones don't.