Power brake conversion questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jetboat · 10-27-2007, 02:19 PM

So I drove my "new" 68 3/4 ton 4x4 home last night and my legs are killing me. 20 miles and Im sick of manual brakes. I have sorted out that I need a booster/MC/brackets and pedal linkage for the conversion then it basically bolts in....My question is where to get the Brackets and linkage???? Will ones out of a newer truck fit? Not many of these trucks in the junkyards around me. Ive been checking Ebay but unless you want a full chrome unit (and I realy dont trust brake parts from ebay) there arent many options and still no linkage.

jkaylor68gmc · 10-27-2007, 02:43 PM

I used an SSBC unit and it is a complete peice for the '68 and includes a new pushrod for the booster and master cylinder that requires a new hole to be drilled 1-inch lower on the pedal. it was no big deal.

jetboat · 10-27-2007, 04:03 PM

Quote:

Originally Posted by jkaylor68gmc

I used an SSBC unit and it is a complete peice for the '68 and includes a new pushrod for the booster and master cylinder that requires a new hole to be drilled 1-inch lower on the pedal. it was no big deal.

It has 35's on it already....Glad it was Tolway most of teh way home!!!!

SSBC????? do explain...

I like the idea of just using a 73+ unit, just need to know how long that pushrod will need to be.

THANKS!!

68K20 x Drill · 10-27-2007, 03:38 PM

Slap some huge tires on there, and wait for your leg to get big

I used 73-up bracket, booster and master.For some reason I installed the bracket and booster upside down, and bolted the upside down booster bracket to a rightside up one which bolted right up to the firewall. Then I made myself a longer pushrod. It was dirt cheap, and I meant to do something cleaner looking one day, but in 10 years it's given me 0 trouble

May not fit with a big block?

jkaylor68gmc · 10-27-2007, 04:07 PM

SSBC= Stainless Steel Brakes Corporation!

68K20 x Drill · 10-27-2007, 04:36 PM

Cut to approximate length, and weld/braise a rod coupler nut to one peice(use some overlap), thread the other end, toss a jam nut on there, thread into coupler. Voila! instant adjustable pushrod. Adjust to 1/32" or so free play.

10-27-2007, 02:19 PM	#1
jetboat Registered User Join Date: Oct 2007 Location: romeoville il Posts: 59	Power brake conversion questions So I drove my "new" 68 3/4 ton 4x4 home last night and my legs are killing me. 20 miles and Im sick of manual brakes. I have sorted out that I need a booster/MC/brackets and pedal linkage for the conversion then it basically bolts in....My question is where to get the Brackets and linkage???? Will ones out of a newer truck fit? Not many of these trucks in the junkyards around me. Ive been checking Ebay but unless you want a full chrome unit (and I realy dont trust brake parts from ebay) there arent many options and still no linkage.

10-27-2007, 02:43 PM	#2
jkaylor68gmc Senior Member Join Date: Dec 2005 Location: TN Posts: 2,448	Re: Power brake conversion questions I used an SSBC unit and it is a complete peice for the '68 and includes a new pushrod for the booster and master cylinder that requires a new hole to be drilled 1-inch lower on the pedal. it was no big deal. __________________ 1947 International KB-1 1957 Chevy Bel-Air riding low 1962 swb fleetside 2002 Chevrolet Silverado 7-inch lift on 35 Daily driver 2016 Chevy Tahoe Better halves ride

10-27-2007, 03:38 PM	#4
68K20 x Drill Registered User Join Date: Apr 2007 Location: Freedom CA Posts: 488	Re: Power brake conversion questions Slap some huge tires on there, and wait for your leg to get big I used 73-up bracket, booster and master.For some reason I installed the bracket and booster upside down, and bolted the upside down booster bracket to a rightside up one which bolted right up to the firewall. Then I made myself a longer pushrod. It was dirt cheap, and I meant to do something cleaner looking one day, but in 10 years it's given me 0 trouble May not fit with a big block? __________________ 68 Chevrolet k20 Longbed 350 SM465/205, Dana 44, 14bolt, Power steering, Power Disk Brakes, 35" BFGs. 84 Chevrolet Suburban K20 6.2 Banks turbo TH400/NP208 Now with G80 68 GMC C20 Parts? Truck And a few cars

10-27-2007, 04:07 PM	#5
jkaylor68gmc Senior Member Join Date: Dec 2005 Location: TN Posts: 2,448	Re: Power brake conversion questions SSBC= Stainless Steel Brakes Corporation! __________________ 1947 International KB-1 1957 Chevy Bel-Air riding low 1962 swb fleetside 2002 Chevrolet Silverado 7-inch lift on 35 Daily driver 2016 Chevy Tahoe Better halves ride

10-27-2007, 04:36 PM	#6
68K20 x Drill Registered User Join Date: Apr 2007 Location: Freedom CA Posts: 488	Re: Power brake conversion questions Cut to approximate length, and weld/braise a rod coupler nut to one peice(use some overlap), thread the other end, toss a jam nut on there, thread into coupler. Voila! instant adjustable pushrod. Adjust to 1/32" or so free play. __________________ 68 Chevrolet k20 Longbed 350 SM465/205, Dana 44, 14bolt, Power steering, Power Disk Brakes, 35" BFGs. 84 Chevrolet Suburban K20 6.2 Banks turbo TH400/NP208 Now with G80 68 GMC C20 Parts? Truck And a few cars



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