mate has an oldish 3000gto and recently fitted a manual boost controller.
problem is finding out what pressure the car is boosting at as detonation is not preffered.

problem is turbos are at the front and back of the engine and unsure where a boost controller could be fitted to show what the car is boosting at.

im guessing inlet manifold or the like but rather unsure!

sorry im not very good at typing stuff tends to get a bit jumbeled up!

 

i thought on them one was a small turbo that came in a lot earlyer then the other one ...but i think u should put it on the inlet thats where u get a good reading