In theory, yes. The exhaust connection would be down stream of the turbo of course, and the lambda sensor if you have one.
That's the valve BL put on the turbo Metty, the metal pipe's for the brake servo.
It also had one of these red jobbies
That transferred the sucking duty from the inlet manifold to the oulet from the air filter when it was making boost.
You only want 1 or 2 psi below atmospheric, so you might well need a restrictor on the line to the manifold. The carb's throttle disc does that job on a normally aspirated SU.
Thanks ethal. What are the valves called and where would I find one?
Regards,
Josh