PB booster upgrade? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

kbeefy · 01-20-2006, 03:05 AM

Howdy! Seems that I may need a brake booster for my '70 k20 suburban. What other booster may be interchangable? PArts availability around here is fairly scarce, if I can bolt on a booster from a 73-87 truck that would simplify matters. If there was an aplication that worked better, that would be good also. (I'm rinning 37" tires so a little help is good) I don't think it matters but I'm running a 76 corvette master cylinder and discs all around.

Thanks!

Brad · 01-20-2006, 03:25 AM

I have a 77 mc on my 67, however if I remember right I had to cut part of the bracket that mounts to the firewall in order to make it fit properly. Very simple mod with a hacksaw and you'll see what I mean once you test fit it.

rodstored-72 · 01-20-2006, 04:25 PM

i installed a booster & mc from a '92 sub. the only mod i did was interchange the rod t othe peddle from the booster, & then i had to modify the mounting bracket on the booster to the firewall, i had to cut some of it away for clearance.

rodstored-72

**dennislbrooks** · 01-20-2006, 04:55 PM

yes, but you will need to modify the mount and unless you drop the mount hole on the pedal you will lose some pedal. Braking will still be fine. The 65-72 use a fulcrum lever firewall mount that makes for more travel with less pedal distance. The rebuilt Cardone units for the 67-72 will run about the same dollar for a 73 up. My opinion unless you are a fabrication freak like I am ---go with the stock setup. Either way power brakes are a great addition.

Also I can tell you that the rod from the firewall mount is 8.5 inches to the center of the pedal hole. On the 73 the rod hole has to be enlarged and moved to use the stock pedal hole and bolt.

01-20-2006, 03:05 AM	#1
kbeefy Registered User Join Date: Jan 2005 Location: Alaska Posts: 39	PB booster upgrade? Howdy! Seems that I may need a brake booster for my '70 k20 suburban. What other booster may be interchangable? PArts availability around here is fairly scarce, if I can bolt on a booster from a 73-87 truck that would simplify matters. If there was an aplication that worked better, that would be good also. (I'm rinning 37" tires so a little help is good) I don't think it matters but I'm running a 76 corvette master cylinder and discs all around. Thanks! __________________ 70 k20 'burban (latest aqusition) 91 k1500 xcab lb 99 f350 (sold) 83 cj7 (huge and for sale) 82 rx7 (auto-x project) 74 VW superbettle 04 summit 800 151 & 05 renegade 600 guns, flying, camping, biking, 4-byin, bbq's and beer!

01-20-2006, 03:25 AM	#2
Brad Out of the carpool lane. Join Date: Jan 2000 Location: Clark Co, WA Posts: 5,673	Re: PB booster upgrade? I have a 77 mc on my 67, however if I remember right I had to cut part of the bracket that mounts to the firewall in order to make it fit properly. Very simple mod with a hacksaw and you'll see what I mean once you test fit it. __________________ 1968 C-10 SWB, 5.7 Vortec/700R4/3.73 posi, Torch Red 1968 Camaro, 250/Powerglide, all original (No, I'm not gonna drop a 350 in it!...Jeez!) 2000 Honda VFR in the faster yellow! 2008 Husqvarna TE-610 1967 C-10 SWB 'Six Appeal'-Gone but not forgotten...

01-20-2006, 04:25 PM	#3
rodstored-72 chevy truck fan Join Date: Mar 2005 Location: Gilbert, arizona 85298 Posts: 2,003	Re: PB booster upgrade? i installed a booster & mc from a '92 sub. the only mod i did was interchange the rod t othe peddle from the booster, & then i had to modify the mounting bracket on the booster to the firewall, i had to cut some of it away for clearance. rodstored-72

01-20-2006, 04:55 PM	#4
dennislbrooks Senior Member Join Date: Feb 2004 Location: Williamsburg, Ohio Posts: 1,787	Re: PB booster upgrade? yes, but you will need to modify the mount and unless you drop the mount hole on the pedal you will lose some pedal. Braking will still be fine. The 65-72 use a fulcrum lever firewall mount that makes for more travel with less pedal distance. The rebuilt Cardone units for the 67-72 will run about the same dollar for a 73 up. My opinion unless you are a fabrication freak like I am ---go with the stock setup. Either way power brakes are a great addition. Also I can tell you that the rod from the firewall mount is 8.5 inches to the center of the pedal hole. On the 73 the rod hole has to be enlarged and moved to use the stock pedal hole and bolt.



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