The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Hard vacuum line to the carb

**DeadheadNM** · 08-03-2020, 08:32 PM

The 1/2 tons in 71-72 had the solenoid for the TCS mounted along the RH head. I’ll dig for a schematic as I’m curious how it ties into this hard line if at all.

Edit: Maybe the line serves to supply the manifold vacuum port on the vacuum advance solenoid for the TCS set up? For 3/4t pickups that weren’t equipped with TCS maybe the rubber hose was just a tad longer going right to the distributor from the rear of the hard line?

08-03-2020, 08:32 PM	#7
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,311	Re: Hard vacuum line to the carb - questions. The 1/2 tons in 71-72 had the solenoid for the TCS mounted along the RH head. I’ll dig for a schematic as I’m curious how it ties into this hard line if at all. Edit: Maybe the line serves to supply the manifold vacuum port on the vacuum advance solenoid for the TCS set up? For 3/4t pickups that weren’t equipped with TCS maybe the rubber hose was just a tad longer going right to the distributor from the rear of the hard line? Attached Images __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland Last edited by DeadheadNM; 08-03-2020 at 09:03 PM. Reason: Added.