non power MC for disc drum - The 1947 - Present Chevrolet & GMC Truck Message Board Network

donthekawguy · 08-17-2014, 07:53 PM

My truck is at the shop for brake lines, steering shaft shortening and final check before I start driving it. I put on front disc brakes from a 85. I picked up a MC and booster for a 70-72 Impala. I got thinking the other day that my cam might be too big to have power brakes. I will have the brake guy check the vacuum in the morning when I swing by after work. If it isn't making enough vacuum, what MC should I use? I need a two pot manual disc/drum MC. I will keep the Impala set up for when I do a motor swap next year.

hopped up · 08-17-2014, 07:55 PM

67 Chevy truck m/c?

**Palf70Step** · 08-17-2014, 09:05 PM

Any 71/72 truck MC should work as long as you have the proportioning valve for the front disks. I think it is pretty much a bolt in replacement when not using the booster.

I have also see folks use the 73-87 style hydroboost off the 3/4 & 1 ton trucks.

**Captainfab** · 08-18-2014, 12:41 AM

You can use a '71-'87 manual brake master cylinder. Or another trip to Pull And Save for a hydroboost.

donthekawguy · 08-18-2014, 07:01 AM

I hope I have enough vacuum. lol If not I might go with hydroboost and save the MC/booster for another truck down the road. But to get it on the road I will go with non power for the rest of this year. Thanx for the help!

bama63 · 08-23-2014, 10:50 PM

72 vette 1" manual master cylinder $24.00 at rockauto.com , direct bolt on and stops on a dime.

Cooper197 · 08-23-2014, 10:58 PM

I kept the original M/C with my truck. Works great! Then again, I'm using McGaughy discs, so that may be part of it.

donthekawguy · 08-24-2014, 03:36 AM

I had the single pot MC and those things are unsafe. And I want the truck to be safe and comfy.

**Captainfab** · 08-25-2014, 12:37 AM

Did you find out yet if your engine produces enough vacuum for a vacuum booster? I have my doubts with that big cam, but thought I'd ask.

08-17-2014, 07:53 PM	#1
donthekawguy Registered User Join Date: Aug 2012 Location: Rathdrum ID Posts: 1,129	non power MC for disc drum My truck is at the shop for brake lines, steering shaft shortening and final check before I start driving it. I put on front disc brakes from a 85. I picked up a MC and booster for a 70-72 Impala. I got thinking the other day that my cam might be too big to have power brakes. I will have the brake guy check the vacuum in the morning when I swing by after work. If it isn't making enough vacuum, what MC should I use? I need a two pot manual disc/drum MC. I will keep the Impala set up for when I do a motor swap next year. __________________ 66 shorty

08-17-2014, 07:55 PM	#2
hopped up Registered User Join Date: Jul 2010 Location: los angeles,ca Posts: 3,617	Re: non power MC for disc drum 67 Chevy truck m/c?

08-17-2014, 09:05 PM	#3
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 47,271	Re: non power MC for disc drum Any 71/72 truck MC should work as long as you have the proportioning valve for the front disks. I think it is pretty much a bolt in replacement when not using the booster. I have also see folks use the 73-87 style hydroboost off the 3/4 & 1 ton trucks. __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!

08-18-2014, 12:41 AM	#4
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: non power MC for disc drum You can use a '71-'87 manual brake master cylinder. Or another trip to Pull And Save for a hydroboost. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

08-18-2014, 07:01 AM	#5
donthekawguy Registered User Join Date: Aug 2012 Location: Rathdrum ID Posts: 1,129	Re: non power MC for disc drum I hope I have enough vacuum. lol If not I might go with hydroboost and save the MC/booster for another truck down the road. But to get it on the road I will go with non power for the rest of this year. Thanx for the help! __________________ 66 shorty

08-23-2014, 10:50 PM	#6
bama63 Registered User Join Date: Jun 2010 Location: gadsden, alabama Posts: 468	Re: non power MC for disc drum 72 vette 1" manual master cylinder $24.00 at rockauto.com , direct bolt on and stops on a dime. __________________ Due to financial constraints, the light at the end of the tunnel will be shut off until further notice

08-23-2014, 10:58 PM	#7
Cooper197 Registered User Join Date: Jul 2014 Location: Eugene, Oregon Posts: 199	Re: non power MC for disc drum I kept the original M/C with my truck. Works great! Then again, I'm using McGaughy discs, so that may be part of it.

08-24-2014, 03:36 AM	#8
donthekawguy Registered User Join Date: Aug 2012 Location: Rathdrum ID Posts: 1,129	Re: non power MC for disc drum I had the single pot MC and those things are unsafe. And I want the truck to be safe and comfy. __________________ 66 shorty

08-25-2014, 12:37 AM	#9
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: non power MC for disc drum Did you find out yet if your engine produces enough vacuum for a vacuum booster? I have my doubts with that big cam, but thought I'd ask. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE



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