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#1 |
Registered User
Join Date: May 2007
Location: Erie pa.
Posts: 57
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changing to disc brake master cylinder
Went to auto zone to get a disc brake master cylinder for my 67 4x4 disc brake conversion, I asked for a 72 master cylinder, the one I got didn't have a deep enough hole for the push rod, do I cut the push rod or is there another solution? Thanks
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65 tripower conv 4spd gto, 66gto, 67 gto 65 lemans conv 4spd 69 firebird conv. 67 c20 4x4 |
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#2 |
Step Brother
Join Date: Sep 2007
Location: K-town
Posts: 4,029
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Re: changing to disc brake master cylinder
When I changed my 69 over, I used one from the 71 donor truck. The push rod was different. George
Last edited by Cyclone44; 09-14-2007 at 10:15 PM. |
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#3 |
67-72 Addict!
Join Date: Feb 2002
Location: The TAX State!
Posts: 7,857
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Re: changing to disc brake master cylinder
I also used one for a 71' but don't know if it's different from a 72' or not.
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Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads |
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#4 |
Registered User
Join Date: Apr 2007
Location: Burnsville MN
Posts: 51
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Re: changing to disc brake master cylinder
Dont cut the rod - take the Mc back and ask for a non power brake MC the hole is deeper for a manual MC - Also remember to adjust the padal to have about 1/16 inch of play so tha MC can return to its resting position or it wont bleed correctly and will push out fluid out the cover.
![]() wpvtx
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1970 Chevy K10 350 CID with 4 speed 4" lift with 86 Dana 44 Front disk brakes Electric fan/Internal regulated Alt. |
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#5 |
Registered User
Join Date: May 2007
Location: Erie pa.
Posts: 57
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Re: changing to disc brake master cylinder
thanks, WPVTX, that helps ALOT!
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65 tripower conv 4spd gto, 66gto, 67 gto 65 lemans conv 4spd 69 firebird conv. 67 c20 4x4 |
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#6 |
Registered User
Join Date: Apr 2007
Location: Burnsville MN
Posts: 51
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Re: changing to disc brake master cylinder
Please let me know - how it works out. I had the hardest time with this conversion. All other times - with fords and dodges it went much smoother.
Good Luck - wpvtx ![]()
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1970 Chevy K10 350 CID with 4 speed 4" lift with 86 Dana 44 Front disk brakes Electric fan/Internal regulated Alt. |
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#7 |
Registered User
Join Date: May 2007
Location: Erie pa.
Posts: 57
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Re: changing to disc brake master cylinder
I went to the auto store and asked for a 72 mc for disc (but no power) brakes and it was the same as the one with power brakes , the rod hole was only about a 1/4" deep and i need it to be about an inch deep (I never measured it yet), I still have my non dics brake mc with power but I was told not to use this because of volume size. should I ask for a different year?
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65 tripower conv 4spd gto, 66gto, 67 gto 65 lemans conv 4spd 69 firebird conv. 67 c20 4x4 Last edited by goldengoat2; 09-17-2007 at 09:13 PM. |
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#8 |
Registered User
Join Date: Apr 2007
Location: Burnsville MN
Posts: 51
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Re: changing to disc brake master cylinder
Golden,
I feel your pain - but truly the non power MC has a deeper hole about 1 inch approx. Just through my old one away so i cant take pics. Remember the auto parts stores are not all knowing - now days they rely on the computer to much. All power disks use a shorter rod between the MC and booster and the longer rod from the pedal to the booster. I would suggest going to a different auto suppier and seeing if they can get you a manual MC. They sometimes intetwine the parts number not knowing if they are interchangable. I hope you get this figured out. I used a 72' also from auto zone wpvtx
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1970 Chevy K10 350 CID with 4 speed 4" lift with 86 Dana 44 Front disk brakes Electric fan/Internal regulated Alt. |
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#9 |
Registered User
Join Date: Jul 2007
Location: cincinnati, OH
Posts: 39
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Re: changing to disc brake master cylinder
You can buy different length rods for the power vs manual MCs. Check with Classic Performance Brake parts in California.
http://www.classicperform.com/ I bought two -one long and one short - when I did a recent disc brake swap, just to make sure I had the right size one. They were $2.50 each. |
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#10 |
Registered User
Join Date: Mar 2004
Location: Corinth,TX
Posts: 444
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Re: changing to disc brake master cylinder
i just did this on my 66 and used a 68 (non-disc) master cylinder and other than having to adjust the rod works perfect, i just put the proportional valve in line just like the disc version....brakes work perfect...
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#11 |
Registered User
Join Date: May 2007
Location: Erie pa.
Posts: 57
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Re: changing to disc brake master cylinder
I think I will use my non disk mc, thanks everyone!
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65 tripower conv 4spd gto, 66gto, 67 gto 65 lemans conv 4spd 69 firebird conv. 67 c20 4x4 |
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#12 | |
Grand PooBaa Member
Join Date: Jan 2001
Location: LA, CA
Posts: 5,302
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Re: changing to disc brake master cylinder
Quote:
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