HELP! Installing new Booster/MC/Prop to 70 C10 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bzblaine · 10-31-2016, 01:41 PM

I have a 1970 C10 Short Step with manual drum all the way around. I'm in the process of installing drop spindles and discs to the front . I'm keeping the drums in the back. I purchased a MC and booster from Pepboys as they had a killer sale. I got a prop valve from a 71/72 c10. I will include links to the Booster and MC below. I have never done this kind of work before so I need a bit of info. What exactly do I need to do for a proper install? I don't have a bracket for the booster, what kind do I need? how do I run the lines from the MC to Prop and so on. did I even purchase the correct things? Any info helps. Pictures would be great. I tried searching the forums but couldn't really find anything. Thanks in advance.

Booster:
https://www.pepboys.com/product/deta...520Big%2520Blk

MC:
https://www.pepboys.com/product/deta...520Big%2520Blk

davepl · 10-31-2016, 01:49 PM

Wouldn't the MC and prop valve for 1971 be intended for use with disc/drum rather than drum/drum? They switched in 1971 from front drum to front disc.

bzblaine · 10-31-2016, 02:14 PM

I do apologize, I might not have been very clear. I will have Disc front and Drum rear. I purchased a drop spindle/ disc setup from Mcgaughy's.

zosoppp · 10-31-2016, 03:21 PM

There should be some sort of bracket holding the current "proportioning-like valve" to the current booster/MC that you can reuse the the new "proportioning valve"

You will also need some missing bracketry to mount and connect the booster to your brake pedal.

kehstr · 10-31-2016, 10:33 PM

This is all factory stuff, so you should be able to get parts from almost anywhere

crakarjax · 11-01-2016, 11:19 AM

http://lmgtfy.com/?q=how+to+replace+...er+and+booster

bzblaine · 11-01-2016, 11:31 AM

Quote:

Originally Posted by crakarjax

http://lmgtfy.com/?q=how+to+replace+...er+and+booster

There is no reason for that. I know how to Google, man. I'm new to this mechanic stuff and was hoping to get some info or pointers from fellow C10 guys that have been through this.

swb4me · 11-01-2016, 01:22 PM

I'm in the middle of adding a power booster to my 67, so I'll let you know what I've learned and done. The part that can be difficult to find is the bracket from a 71 or 72 c10 that mounts the booster to the firewall. I've read that the 73 and up bracket will work with some modification, but I decided to buy a booster from early classic enterprises that includes a new bracket. I've already installed a 4/6 drop from ece, so I went with their booster because it was designed/intended to be used with the rest of their kit. Lastly a new hole, 1 inch lower, needs to be drilled in the brake pedal that holds the push rod to maintain the proper 4.5 to 1 ratio.

10-31-2016, 01:41 PM	#1
bzblaine Registered User Join Date: Dec 2015 Location: San Antonio, Texas Posts: 60	HELP! Installing new Booster/MC/Prop to 70 C10 I have a 1970 C10 Short Step with manual drum all the way around. I'm in the process of installing drop spindles and discs to the front . I'm keeping the drums in the back. I purchased a MC and booster from Pepboys as they had a killer sale. I got a prop valve from a 71/72 c10. I will include links to the Booster and MC below. I have never done this kind of work before so I need a bit of info. What exactly do I need to do for a proper install? I don't have a bracket for the booster, what kind do I need? how do I run the lines from the MC to Prop and so on. did I even purchase the correct things? Any info helps. Pictures would be great. I tried searching the forums but couldn't really find anything. Thanks in advance. Booster: https://www.pepboys.com/product/deta...520Big%2520Blk MC: https://www.pepboys.com/product/deta...520Big%2520Blk __________________ 1970 C10 Stepside SWB - 468 BBC

10-31-2016, 01:49 PM	#2
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Re: HELP! Installing new Booster/MC/Prop to 70 C10 Wouldn't the MC and prop valve for 1971 be intended for use with disc/drum rather than drum/drum? They switched in 1971 from front drum to front disc. __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible

10-31-2016, 02:14 PM	#3
bzblaine Registered User Join Date: Dec 2015 Location: San Antonio, Texas Posts: 60	Re: HELP! Installing new Booster/MC/Prop to 70 C10 I do apologize, I might not have been very clear. I will have Disc front and Drum rear. I purchased a drop spindle/ disc setup from Mcgaughy's. __________________ 1970 C10 Stepside SWB - 468 BBC

10-31-2016, 03:21 PM	#4
zosoppp Registered User Join Date: Mar 2014 Location: Lincoln Park, NJ Posts: 190	Re: HELP! Installing new Booster/MC/Prop to 70 C10 There should be some sort of bracket holding the current "proportioning-like valve" to the current booster/MC that you can reuse the the new "proportioning valve" You will also need some missing bracketry to mount and connect the booster to your brake pedal. __________________ 1970 C10 LWB 350SBC, SM330 Muncie (not saginaw SM326) (on tree), 3.07 open (assumed), PS, PB, Idiot lights

10-31-2016, 10:33 PM	#5
kehstr Registered User Join Date: Mar 2015 Location: Utah Posts: 750	Re: HELP! Installing new Booster/MC/Prop to 70 C10 This is all factory stuff, so you should be able to get parts from almost anywhere __________________ 72 GMC highlander nicknamed by my then 6-year-old brother "stripes" http://67-72chevytrucks.com/vboard/s....php?p=7378180 Check out my Youtube channel @Chad's Fab

11-01-2016, 11:19 AM	#6
crakarjax Registered User Join Date: Dec 2009 Location: Kirkland, WA Posts: 1,302	Re: HELP! Installing new Booster/MC/Prop to 70 C10 http://lmgtfy.com/?q=how+to+replace+...er+and+booster __________________ 1968 LWB C20 / AC / Wood Bed

11-01-2016, 01:22 PM	#8
swb4me Registered User Join Date: Sep 2015 Location: SE Idaho Posts: 153	Re: HELP! Installing new Booster/MC/Prop to 70 C10 I'm in the middle of adding a power booster to my 67, so I'll let you know what I've learned and done. The part that can be difficult to find is the bracket from a 71 or 72 c10 that mounts the booster to the firewall. I've read that the 73 and up bracket will work with some modification, but I decided to buy a booster from early classic enterprises that includes a new bracket. I've already installed a 4/6 drop from ece, so I went with their booster because it was designed/intended to be used with the rest of their kit. Lastly a new hole, 1 inch lower, needs to be drilled in the brake pedal that holds the push rod to maintain the proper 4.5 to 1 ratio.



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