Q: Parking brake on '72 K20? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Daubs** · 02-15-2005, 11:11 AM

History: Truck is a mutt...3/4 ton two wheel drive body on 3/4 ton 4x4 frame and running gear. PO tells me he couldn't make parking brake work, so he installed vacuum line lock(?) for a parking brake. You flip the lock and pump the brakes. It holds the rear brakes locked. Works for about a minute, then the truck starts to roll.

I haven’t been under the truck yet and have not pulled rear drums off (full floater...that's going to be fun). Assuming I have all the needed parts in the rear end, what would it take to put in a standard parking brake back in besides the cable? Pbrake mechanism is still in the cab.

Suggestions?

**JIMs70GMC** · 02-15-2005, 11:17 AM

Hmmmm, I put a 2wd cab on my 71 chassis and used the cable from the 71. So you'll need the cable that goes from the foot brake to the bracket on the frame. The 2wd cable went through the frame the 4wd does not. Also, the cable that goes side to side is shorter on the 4wd v. 2wd since it is further back where it crosses from side to side.

02-15-2005, 11:11 AM	#1
Daubs Registered User Join Date: Jan 2005 Location: Eastern Nebraska Posts: 611	Q: Parking brake on '72 K20? History: Truck is a mutt...3/4 ton two wheel drive body on 3/4 ton 4x4 frame and running gear. PO tells me he couldn't make parking brake work, so he installed vacuum line lock(?) for a parking brake. You flip the lock and pump the brakes. It holds the rear brakes locked. Works for about a minute, then the truck starts to roll. I haven’t been under the truck yet and have not pulled rear drums off (full floater...that's going to be fun). Assuming I have all the needed parts in the rear end, what would it take to put in a standard parking brake back in besides the cable? Pbrake mechanism is still in the cab. Suggestions? __________________ '72 Chevy K-20 Crate 350, SM465, 4.10's

02-15-2005, 11:17 AM	#2
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	Hmmmm, I put a 2wd cab on my 71 chassis and used the cable from the 71. So you'll need the cable that goes from the foot brake to the bracket on the frame. The 2wd cable went through the frame the 4wd does not. Also, the cable that goes side to side is shorter on the 4wd v. 2wd since it is further back where it crosses from side to side. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm



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