Thanks Frank,
That will work well for you and as long as your wiper motor is designed to use a negative ground you will be fine to ground it to the frame or body. From your original post, I think this is the case but I do not know about your wiper motor and I do know until sometime around 1965 VWs were 6 volt and positive ground. A friend of mine owned one of them. If by some chance you have one of these 6v wiper motors I think it would be prudent to isolate that motor and provide it with a separate positive and negative voltage.


~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end