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A-body Power Brake Booster
#2740336
02/06/20 02:19 PM
02/06/20 02:19 PM
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Joined: Jan 2003
Posts: 10,713
North Dakota
6PakBee
OP
I Live Here
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OP
I Live Here
Joined: Jan 2003
Posts: 10,713
North Dakota
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I am a little embarrassed to ask this but....what would be the correct power brake booster for a 1969 GTS Dart with power drum brakes?
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: A-body Power Brake Booster
[Re: 6PakBee]
#2740488
02/06/20 08:27 PM
02/06/20 08:27 PM
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Joined: Jan 2003
Posts: 43,541
Round Lake Beach, Illinoisy
Rhinodart
Rhinotruck
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Rhinotruck
Joined: Jan 2003
Posts: 43,541
Round Lake Beach, Illinoisy
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7-1/2 inch rebuildable unit. Shown here with a disc brake master cylinder, but the booster is the same.
The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.
JB Rhinehart, Realist
A-Body's RULE!
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Re: A-body Power Brake Booster
[Re: rarefish]
#2741457
02/10/20 12:49 AM
02/10/20 12:49 AM
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Joined: Jan 2003
Posts: 10,713
North Dakota
6PakBee
OP
I Live Here
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OP
I Live Here
Joined: Jan 2003
Posts: 10,713
North Dakota
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Thanks! I take it yours is a disc brake car also?
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: A-body Power Brake Booster
[Re: 6PakBee]
#2741516
02/10/20 11:05 AM
02/10/20 11:05 AM
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Joined: Jan 2003
Posts: 2,252
New York
rarefish
top fuel
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top fuel
Joined: Jan 2003
Posts: 2,252
New York
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Thanks! I take it yours is a disc brake car also? Yes, you are correct...
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Re: A-body Power Brake Booster
[Re: moparx]
#2741755
02/10/20 10:12 PM
02/10/20 10:12 PM
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Joined: Apr 2011
Posts: 315
Ontario, Canada
RealWing
enthusiast
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enthusiast
Joined: Apr 2011
Posts: 315
Ontario, Canada
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Dimensions on the back of the booster.
Did you mean this pushrod from brake pedal to linkage on the back of the booster???
Jim
1970 Superbird 440-6bbl, auto
1969 Barracuda 340-4bbl, FB Formula S auto
1969 Barracuda 6.1 L Hemi, 5 speed, Convertible
2022 Can Am Spyder RTL
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Re: A-body Power Brake Booster
[Re: RealWing]
#2741775
02/10/20 11:38 PM
02/10/20 11:38 PM
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Joined: Aug 2004
Posts: 3,393
cheshire, ct
davesmopars
master
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master
Joined: Aug 2004
Posts: 3,393
cheshire, ct
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isn't 7 1/2 inch brake booster 71 72 a body. I thought 67 to 70 was the smaller one
Last edited by davesmopars; 02/10/20 11:39 PM.
Keeper of the 440 M code Cuda registry
mcodecuda@yahoo.com
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Re: A-body Power Brake Booster
[Re: davesmopars]
#2741913
02/11/20 12:41 PM
02/11/20 12:41 PM
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Joined: Apr 2011
Posts: 315
Ontario, Canada
RealWing
enthusiast
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enthusiast
Joined: Apr 2011
Posts: 315
Ontario, Canada
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isn't 7 1/2 inch brake booster 71 72 a body. I thought 67 to 70 was the smaller one The '69 is definitely a 7-1/2" Jim
1970 Superbird 440-6bbl, auto
1969 Barracuda 340-4bbl, FB Formula S auto
1969 Barracuda 6.1 L Hemi, 5 speed, Convertible
2022 Can Am Spyder RTL
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Re: A-body Power Brake Booster
[Re: RealWing]
#2742080
02/11/20 08:49 PM
02/11/20 08:49 PM
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Joined: Aug 2004
Posts: 3,393
cheshire, ct
davesmopars
master
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master
Joined: Aug 2004
Posts: 3,393
cheshire, ct
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isn't 7 1/2 inch brake booster 71 72 a body. I thought 67 to 70 was the smaller one The '69 is definitely a 7-1/2" Jim i thought 6 1/2
Keeper of the 440 M code Cuda registry
mcodecuda@yahoo.com
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Re: A-body Power Brake Booster
[Re: davesmopars]
#2742103
02/11/20 10:07 PM
02/11/20 10:07 PM
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Joined: Jan 2003
Posts: 43,541
Round Lake Beach, Illinoisy
Rhinodart
Rhinotruck
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Rhinotruck
Joined: Jan 2003
Posts: 43,541
Round Lake Beach, Illinoisy
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The early one is actually 7". I had one on my 67 383 Barracuda, also seen them on 67 Darts. I don't when they switched over, but the 7" is not rebuildable without major work to take the case apart.
The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.
JB Rhinehart, Realist
A-Body's RULE!
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Re: A-body Power Brake Booster
[Re: Rhinodart]
#2742121
02/11/20 11:20 PM
02/11/20 11:20 PM
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Joined: Apr 2011
Posts: 315
Ontario, Canada
RealWing
enthusiast
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enthusiast
Joined: Apr 2011
Posts: 315
Ontario, Canada
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I stand corrected. Got out my big calipers and my original '69 measures 6-1/2" across the case and 7" on the outside of the band. I think this is known as the "Second Generation" booster.
The later one measures 7" across the case and 7-1/2" across the outside of the band. This is the "Third generation" booster.
Chrysler had a dealer install booster kit p/n 3420972 for '67-'70 Dart and Valiant and '67-'69 Barracuda. It was the larger 3rd generation (7-1/2" ) booster.
Jim
Last edited by RealWing; 09/02/21 08:36 PM.
1970 Superbird 440-6bbl, auto
1969 Barracuda 340-4bbl, FB Formula S auto
1969 Barracuda 6.1 L Hemi, 5 speed, Convertible
2022 Can Am Spyder RTL
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Re: A-body Power Brake Booster
[Re: RealWing]
#2742189
02/12/20 09:53 AM
02/12/20 09:53 AM
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Joined: Sep 2003
Posts: 19,388
north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,388
north of coder
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Dimensions on the back of the booster.
Did you mean this pushrod from brake pedal to linkage on the back of the booster???
Jim
thanks Jim!  both rods. the one sticking out from the back of the booster and the linkage [flat one] rod shown. Thank you again !  
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Re: A-body Power Brake Booster
[Re: RealWing]
#2742200
02/12/20 11:03 AM
02/12/20 11:03 AM
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Joined: Jan 2003
Posts: 43,541
Round Lake Beach, Illinoisy
Rhinodart
Rhinotruck
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Rhinotruck
Joined: Jan 2003
Posts: 43,541
Round Lake Beach, Illinoisy
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I stand corrected. Got out my big calipers and my original '69 measures 6-1/2" across the case and 7" on the outside of the band.
Jim Does your band have the bolt like shown above?
The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.
JB Rhinehart, Realist
A-Body's RULE!
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Re: A-body Power Brake Booster
[Re: Rhinodart]
#2742244
02/12/20 12:47 PM
02/12/20 12:47 PM
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Joined: Apr 2011
Posts: 315
Ontario, Canada
RealWing
enthusiast
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enthusiast
Joined: Apr 2011
Posts: 315
Ontario, Canada
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Hope these photos help. Let me know if you need anything else
Jim
1970 Superbird 440-6bbl, auto
1969 Barracuda 340-4bbl, FB Formula S auto
1969 Barracuda 6.1 L Hemi, 5 speed, Convertible
2022 Can Am Spyder RTL
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Re: A-body Power Brake Booster
[Re: moparx]
#2742604
02/13/20 03:21 PM
02/13/20 03:21 PM
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Joined: Jan 2003
Posts: 10,713
North Dakota
6PakBee
OP
I Live Here
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OP
I Live Here
Joined: Jan 2003
Posts: 10,713
North Dakota
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PERFECT ! Thank You Sir !  X2! Pushing my luck, does anyone have a picture of the horizontal and vertical braces mentioned in the installation instructions?
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: A-body Power Brake Booster
[Re: 6PakBee]
#2742837
02/14/20 12:45 PM
02/14/20 12:45 PM
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Joined: Apr 2011
Posts: 315
Ontario, Canada
RealWing
enthusiast
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enthusiast
Joined: Apr 2011
Posts: 315
Ontario, Canada
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PERFECT ! Thank You Sir ! X2! Pushing my luck, does anyone have a picture of the horizontal and vertical braces mentioned in the installation instructions? Yup!!!!!!
1970 Superbird 440-6bbl, auto
1969 Barracuda 340-4bbl, FB Formula S auto
1969 Barracuda 6.1 L Hemi, 5 speed, Convertible
2022 Can Am Spyder RTL
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