Performance indicater

My car did have A.C. and there is a T fitting on the other side near the fan assy. None of that is connected as I stupidly tossed the compressor. All other A.C. stuff is there except I removed the dryer and associated plumbing and condensor. I have this fitting on the manifold where the brake booster and vacumme line are connected. It's a large port for the booster line and a small spur for the "Performance guage"


John B.