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02-29-2012, 01:06 PM
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#1 |
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Registered User
Join Date: Aug 2009
Location: hillborough nc
Posts: 410
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manual to power brakes?
how hard would it be to convert my 79 c-10 to power brakes? would i have to replace my master cylender? its a brand new master cylender and i dont realy wanna have to buy a new one. im going to the junk yard to round up some parts next week while im on spring break. so it would be nice to know if i could swipe just a booster and the vacumme line and put it on my truck
thanks guys josh
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77 chevy BIG 10 350/sm465/12bolt w 3.73 bout 240 horse power NO power steerin 79 chevy 1/2 ton 250/three on the tree/3.08s soon to get built 250/floor shift conversion/3.08s 81 mercedes 300d 25 MPG 77 chevy BIG DOOLEY 454/sm-465/14 bolt 4.10s "fully loaded" 73 plymouth duster 225 slant six/230 3 speed/8 1/4 trying to acheve 300 horse six http://www.cardomain.com/ride/3135091 '77 chevy trucks. built to stay tough. life is short build a hot rod 
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02-29-2012, 03:03 PM
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#2 |
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Registered User
Join Date: Jul 2009
Location: washington
Posts: 4,178
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Re: manual to power brakes?
Think the Brake pedal meets to be adjusted for power brake use as manual and power brakes have different travel ratios
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377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511 |
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02-29-2012, 03:32 PM
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#3 | |
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Registered User
Join Date: May 2010
Location: Rochester NY
Posts: 831
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Re: manual to power brakes?
Quote:
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1973 k20 Suburban 350 1974 Custom stepside c-10 250 1975 Chevy stepside 454 1986 K30 Crewcab SRW 350 R.I.P- glimmertwin01- board member and good friend, you will be missed |
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02-29-2012, 07:06 PM
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#4 |
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Registered User
 
Join Date: Apr 2011
Location: Hartford CT
Posts: 223
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Re: manual to power brakes?
Just did this on my '80. I bought a vacuum booster off an '84, and bought a new M/C. They're relatively cheap on RockAuto. The bottom two mounting holes are the same, but you'll have to drill (3/8" IIRC) the two top holes
You don't have to change out the pedal assembly if you don't want to. I kept my pedal bracket assembly (truck was originally a 3-on-the-tree, converted to TH350 before my ownership, the PO just simply removed the clutch pedal) and changed out my brake pedal because I wanted the right wide pedal for an automatic. I pulled it from an '86 C20 that my buddy was scrapping. In the below photo, you can see the manual-brake pedal on the bottom and the power-brake pedal on the top. The holes are there on the "manual" pedal (if you still have stick-shift) - you just have to press a new pin in whichever assist type you go with. IIRC, from the top, the order is manual-vaccum-hydroboost You can see how the holes lined up with the the automatic pedal (which only came with power assist) and how the ratio is different than the manual brake pedal. I did some quick n' dirty calculations, which are on the second photo. Everything else lined up perfectly. It's an easy swap...don't forget to bleed your brakes after!  
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-Steve  1980 GMC C15 Sierra LWB Dark Carmine Red/Carmine Int Was: 250/3spd (1980-88), then a 305/TH350 (1988-2011) Now: 5.3/4L60E, 2.73 12-bolt open rear |
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06-29-2012, 08:31 PM
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#5 |
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Registered User
Join Date: Jun 2012
Location: dfw
Posts: 183
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Re: manual to power brakes?
Hey man if you end up replacing the master cylinder go to auto zone, I paid 15 for it and got 5 back for the Core return, when I bench bleed the MC i used a steering wheel puller and a power drill, worked like a charm only took like 15 minutes to bench bleed.
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