Maybe they're almost the same after all...
So, GLHNSLHT2 posted a vac diagram over in the Turbonator SBEC thread showing a 'T1' vacuum diagram that looks just like a T2 vacuum diagram (here - http://www.turbo-mopar.com/forums/sh...=1#post1021161). Except that it's from a ~'92 car apparently. So, clearly I had to figure this out.
I looked over all of the US cals I have for the '92 T1's (and I'm admittedly missing a few); and they all have nearly the same boost control values as a '90/91 or '89 T1. Not at all like a 'T2'. Thinking about it, I realized that this plumbing will work just fine - as long as the WG Solenoid is plumbed normally closed (IE with no power to the solenoid) so that manifold pressure reaches the WG Actuator. This part is in fact completely backwards from the original T2. But, it's also the best of both worlds. You get the fast spool of the T2 type of boost control, and the fail-safe plumbing of a normally closed solenoid/vac system.
The plumbing in the post above should work with the 'T1' boost control in any of the Turbonator cals. And, I'm actually going to take a much closer look at the '92 boost control code now. It has many added control features that the earlier cals do not. Maybe I can learn some more from it.
I think that the TIII cals may use a similar boost control scheme.