The engine is now fitted to my 49 Merc so the VIN number won't help, I believe the donar car was a late 70's cadillac but all the 425 cubic inch engines fitted to Cadillacs used the same starter.
The Towbar has to be the cheapest option it is only going to be towing a small trailer so weight is not an issue.
As a target I know I can get the towbar with wiring kit for £200 and the starter was around £120 delivered
Hope you can help as I like to support new businesses within our hobby.