Hello from what I've found there was no turbo gauge fitted to the LPT see thread below
http://www.saabscene.com/forum/threads/97977-Turbo-boost-pressure-gauge-on-LPT
Also a little light reading for you .
https://en.m.wikipedia.org/wiki/Saab_900
Hopefully that will give you some idear of the different models .
And good luck with your purchase .
http://www.saabscene.com/forum/threads/97977-Turbo-boost-pressure-gauge-on-LPT
Also a little light reading for you .
https://en.m.wikipedia.org/wiki/Saab_900
Hopefully that will give you some idear of the different models .
And good luck with your purchase .