Power Brake Conversion (Clarification) - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Sgt.Booya · 05-31-2006, 09:48 PM

I've read this thread in the FAQ section.
http://67-72chevytrucks.com/vboard/s...d.php?t=163387 (It wouldn't let me post in that thread so I hope I'm not breaching etiquette by starting a new thread??)

Farside847 has done a great job explaining this conversion however, I think he failed to account for how stupid I actually am.....

He indicates that, "the old pushrod for manual brakes, its quite a bit longer than the power brake one". This would make me think that you'd need a new pushrod. I would assume this would come from the donor truck? I know DUH! but just looking to confirm.

I'm looking at doing the conversion on a 1970 Chev C10 with a drum/drum setup right now. A few questions hopefully some of you guys who have done this can help me out with:

Parts List
1) Does someone have an exact parts list that is required for this conversion?
I'm thinking this would be all thats needed but if I'm missing something could you let me know please?
Parts needed:
Power Booster from 67-72 donor truck (DT)
Shorter pushrod from 67-72 DT
Brass fitttings, hose, clamps for vaccum line.

Quick sidebar
2) Can you use the booster from a 73-87 truck? Would it be a direct bolt on? Would the shorter pushrod from a 73-87 work in the 67-72?

Thank you.

Chevrolet4x4s · 05-31-2006, 10:13 PM

I loked at the tiltle wrong..........I thought that somebody was wondering what it is to powerbrake.....long day......I read it Power Brake Conversation (Clarification)

Shane

Sgt.Booya · 06-01-2006, 11:09 PM

Any takers? Going to the Bone Yard tomorrow see what what's available. I'd think it would be easier to loacte something off a 73-87...

dwcsr · 06-02-2006, 03:11 AM

take a look at this

http://67-72chevytrucks.com/vboard/s...d.php?t=175714

Sgt.Booya · 06-02-2006, 09:50 AM

Thanks for the link dwcsr. I think thats a little over my head, besides I can't really see the big advantage of hydro over vaccum. I don't want to have to fabricate anything just looking for a suitable, (only marginally difficult), "bolt in" solution.

**N2TRUX** · 06-02-2006, 04:33 PM

I'm going to move this to the 67-72 forum in hopes you get your answers...

krue · 06-02-2006, 07:08 PM

You need to try to get the booster with the m/c (make sure there's a rod between them) and the brackets bolting the booster to the firewall (1/2 ton booster has different brackets than 3/4 ton). (If you can get a 3/4 ton or 1 ton setup it will give more boost.) You also need the rod that runs from the brake pedal to the booster (your old one won't work). Go get a new check valve for the booster where the vacuum line connects. Make sure you have a vacuum port on your intake or carb.

You're probably gonna want to replace the m/c with a rebuilt one.

Sgt.Booya · 06-03-2006, 07:38 AM

Thanks Krue

05-31-2006, 09:48 PM	#1
Sgt.Booya Registered User Join Date: Apr 2006 Location: Ontario, Canada Posts: 75	Power Brake Conversion (Clarification) I've read this thread in the FAQ section. http://67-72chevytrucks.com/vboard/s...d.php?t=163387 (It wouldn't let me post in that thread so I hope I'm not breaching etiquette by starting a new thread??) Farside847 has done a great job explaining this conversion however, I think he failed to account for how stupid I actually am..... He indicates that, "the old pushrod for manual brakes, its quite a bit longer than the power brake one". This would make me think that you'd need a new pushrod. I would assume this would come from the donor truck? I know DUH! but just looking to confirm. I'm looking at doing the conversion on a 1970 Chev C10 with a drum/drum setup right now. A few questions hopefully some of you guys who have done this can help me out with: Parts List 1) Does someone have an exact parts list that is required for this conversion? I'm thinking this would be all thats needed but if I'm missing something could you let me know please? Parts needed: Power Booster from 67-72 donor truck (DT) Shorter pushrod from 67-72 DT Brass fitttings, hose, clamps for vaccum line. Quick sidebar 2) Can you use the booster from a 73-87 truck? Would it be a direct bolt on? Would the shorter pushrod from a 73-87 work in the 67-72? Thank you. __________________ If you keep and open mind you never know what might drop in. 1970 Chev C10 SWB, "250 turbo thrift"

05-31-2006, 10:13 PM	#2
Chevrolet4x4s Registered User Join Date: Nov 2005 Location: WV Posts: 227	Re: Power Brake Conversion (Clarification) I loked at the tiltle wrong..........I thought that somebody was wondering what it is to powerbrake.....long day......I read it Power Brake Conversation (Clarification) Shane __________________ 1993 K1500 350 5 speed 1985 K10 Silverado Vortec 406 5 speed (in body shop) "I been drivin' this '85 pickup truck Them buddies of mine call it a bucket of rust She's a little beat up but she still runs like the wind Yeah, kinda like me I been banged and bruisedBeen around the block a time or two But I'm runnin' like new goin' places I never been No, I ain't broke I'm just broken in" 1963 Dodge Townwagon(its amazng what 30 years and zero miles will do to a vehicle ) Member#20327

06-01-2006, 11:09 PM	#3
Sgt.Booya Registered User Join Date: Apr 2006 Location: Ontario, Canada Posts: 75	Re: Power Brake Conversion (Clarification) Any takers? Going to the Bone Yard tomorrow see what what's available. I'd think it would be easier to loacte something off a 73-87... __________________ If you keep and open mind you never know what might drop in. 1970 Chev C10 SWB, "250 turbo thrift"

06-02-2006, 03:11 AM	#4
dwcsr Hollister Road Co. Join Date: Apr 2005 Location: Houston Posts: 6,134	Re: Power Brake Conversion (Clarification) take a look at this http://67-72chevytrucks.com/vboard/s...d.php?t=175714

06-02-2006, 09:50 AM	#5
Sgt.Booya Registered User Join Date: Apr 2006 Location: Ontario, Canada Posts: 75	Re: Power Brake Conversion (Clarification) Thanks for the link dwcsr. I think thats a little over my head, besides I can't really see the big advantage of hydro over vaccum. I don't want to have to fabricate anything just looking for a suitable, (only marginally difficult), "bolt in" solution. __________________ If you keep and open mind you never know what might drop in. 1970 Chev C10 SWB, "250 turbo thrift"

06-02-2006, 04:33 PM	#6
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,023	Re: Power Brake Conversion (Clarification) I'm going to move this to the 67-72 forum in hopes you get your answers... __________________ Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra"

06-02-2006, 07:08 PM	#7
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	Re: Power Brake Conversion (Clarification) You need to try to get the booster with the m/c (make sure there's a rod between them) and the brackets bolting the booster to the firewall (1/2 ton booster has different brackets than 3/4 ton). (If you can get a 3/4 ton or 1 ton setup it will give more boost.) You also need the rod that runs from the brake pedal to the booster (your old one won't work). Go get a new check valve for the booster where the vacuum line connects. Make sure you have a vacuum port on your intake or carb. You're probably gonna want to replace the m/c with a rebuilt one. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

06-03-2006, 07:38 AM	#8
Sgt.Booya Registered User Join Date: Apr 2006 Location: Ontario, Canada Posts: 75	Re: Power Brake Conversion (Clarification) Thanks Krue __________________ If you keep and open mind you never know what might drop in. 1970 Chev C10 SWB, "250 turbo thrift"



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