The walter v-drive has a unique engine interface, and is not compatable with modern standardized transmission mounts. You would have to find a modern v-drive that matches the 24-degree "V" angle of the Walter. Until recently, that was pretty difficult, and would require extensive engine bed modification and result in an engine mounted at a too-steep or too-flat angle. But I believe there is now a V-drive available that matches the Walter's angle.