If you go to Inliners, look for guys that go by EFI-DIY or Limequat.
EFI-DIY (Jerry) has a turbo '50 GMC with the 4200. He's a wealth kwowledge.
LIMEQUAT (Jeremy) has a turboed 4200 in a Toyota. He does custom wiring harness' and re-flashes ECMs on the side.
Both guys are more than willing to help anyone. They also have a ton of You-tube videos of their projects.
