Which brake master cylinder? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bluec10 · 02-07-2003, 09:39 PM

I'm installing a set of front disc brakes from an '84 Chevy onto my '68. The stock non-power brake master cylinder is obviously inadequate. Which master cylinder should I use? I plan to keep the rear drums for now.

sgtjed · 02-08-2003, 12:42 AM

any master cyl should work from 72 on up to 84. make sure that you get the correct proportioning valve,again 73 up to 84.

Slammed67 · 02-08-2003, 03:03 PM

I'm using a MC off an '85 1/2 ton truck, with stock front disc/rear drum brakes with no power booster. I've very happy with it. Of course it takes more pedal effort than power brakes, but it's not too bad in my opinion. My prop valve is off an '85 S-10 and it works just find. I'd imagine the 1/2 ton and s-10 valves are the same. I was originally gong to use the S-10 MC but the 1/2 ton MC had a larger bore so figured it'd give better stopping power (without the booster). I had ot slightly enlarge the hole where the MC sticks through the firewall, but other than that it bolted right up.

02-07-2003, 09:39 PM	#1
bluec10 Registered User Join Date: Apr 2002 Location: Manitoba, Canada Posts: 663	Which brake master cylinder? I'm installing a set of front disc brakes from an '84 Chevy onto my '68. The stock non-power brake master cylinder is obviously inadequate. Which master cylinder should I use? I plan to keep the rear drums for now. __________________ Present: 2015 Tacoma. Yeah, not a GM, but I love it. 1969 GMC 32,000 - fix, drive, relax, fix... 2019 BMW R1250 GSA - Yahoooooooo 1979 Honda GL 1000 - retro touring at its best. Past: '05 Sierra 4x4 - Had 270,000 KM and running well when it was written-off by a stop sign runner. '94 F-150 from the "F word" company. I'll admit it...good truck. Sold what was left of it for $800 to a guy who came to pick it up at 11:00 PM with cash in hand. Hmm. '79 Sierra Grande (Black) organ donor - perfect rebuildable 4-bolt 350 and a good TH350. '76 Sierra Grande (Orange) - hate isn't too strong a word. Kid who bought it turned it into a hot rod. '68 C-10 R.I.P. - Dad's old truck...too far gone to resurrect. '59 C-50 - with hoist. Truck is gone, wife isn't. Nuff said.

02-08-2003, 03:03 PM	#3
Slammed67 Progress = 0% Join Date: Nov 2001 Location: Kansas City, MO Posts: 2,108	I'm using a MC off an '85 1/2 ton truck, with stock front disc/rear drum brakes with no power booster. I've very happy with it. Of course it takes more pedal effort than power brakes, but it's not too bad in my opinion. My prop valve is off an '85 S-10 and it works just find. I'd imagine the 1/2 ton and s-10 valves are the same. I was originally gong to use the S-10 MC but the 1/2 ton MC had a larger bore so figured it'd give better stopping power (without the booster). I had ot slightly enlarge the hole where the MC sticks through the firewall, but other than that it bolted right up. __________________ Jason - '67 GMC swb \| '57 Bel-Air 4dr hardtop \| '56 210 4dr Wagon \| 2000 GMC Sierra

02-08-2003, 12:42 AM	#2
sgtjed What if? Join Date: Oct 2002 Location: Choctaw,Oklahoma Posts: 649	any master cyl should work from 72 on up to 84. make sure that you get the correct proportioning valve,again 73 up to 84.



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