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

**DeadheadNM** · 08-03-2020, 05:15 PM

I’m curious about the hard vacuum advance line. All motors? All models? Different styles for different years? What about AIR equipped motors? Affixed with spring clamps at the rubber hose?

Can anyone shed details?

Neither of my SB motors have these so looking to add if original equipment. A BB motor I used to own did have this line.

Borrowed example pics show the line joining the carb on the LH front port.

08-03-2020, 05:15 PM	#1
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,308	Hard vacuum line to the carb - questions. I’m curious about the hard vacuum advance line. All motors? All models? Different styles for different years? What about AIR equipped motors? Affixed with spring clamps at the rubber hose? Can anyone shed details? Neither of my SB motors have these so looking to add if original equipment. A BB motor I used to own did have this line. Borrowed example pics show the line joining the carb on the LH front port. 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