Don't screw with the vacuum controlled wastegate. It's intended for a vacuum transducer and computer control. Just swap in a standard pressure controlled wastegate.

As for a source, I would say maybe a T3 wastegate. It's probably going to take some modification but there may be a direct bolt on. I've never researched it thoroughly.

You'll also need a pump off a later car with 6mm elements to get the performance of the turbo car otherwise you're wasting your time adding the turbo.

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250