Intake Manifold Vacuum T-Fitting

[Rust_never_sleeps]

Originally Posted by PbFut

The check valve in the ac reservoir and 2nd one in the brake booster is there to stop the vacuum from bleeding off after engine is shut off. Should alow vents or brakes to function 1 or 2 cycles if engine is off or stalled. The check valve will not protect from a major leak.

Gotcha, totally missed the reservoir function, thanks

some interesting commentary here ICYGAS ;-)

https://67-72chevytrucks.com/vboard/...31&postcount=6