Is the main body harness on a T2 the same as a NA?

 

As far as I know every wiring harness was the same for every car within its own series. So it should be the same.

 

Depends what you're calling the main body harness. There's a front harness, and then there's an engine harness (not to be confused with the engine management harness). Turbo and NA engine harnesses are different in small ways such as the alternator wiring. And the front harnesses will have a handful of differences as well.

Take a look at the wiring section of either FSM, and you'll be able to see exactly what changes.