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Question 426 Hemi Brake Booster offset in 70 Challenger #2959241
08/30/21 10:28 PM
08/30/21 10:28 PM
Joined: May 2005
Posts: 581
Texas
Texican Offline OP
mopar
Texican  Offline OP
mopar

Joined: May 2005
Posts: 581
Texas
I apologize if there are already posts or documents on this subject, I searched and could not find what I'm looking for.

My Big Block 4-Speed 70 Challenger currently has a small diameter power booster but I was told, in order to install my 426 Hemi, it would require an offset brake booster and different MC.

1.) Is there a document or post that details exactly what kind of brake booster & master cylinder is required to fit under the hood with a 426 hemi ?

2.) Is it possible to simply buy an offset bracket for my Booster & MC ?

Thanks in advance,

Last edited by Texican; 08/30/21 10:31 PM.
Re: Question 426 Hemi Brake Booster offset in 70 Challenger [Re: Texican] #2959247
08/30/21 10:34 PM
08/30/21 10:34 PM
Joined: Jan 2004
Posts: 1,249
North Carolina
4
469runner Offline
pro stock
469runner  Offline
pro stock
4

Joined: Jan 2004
Posts: 1,249
North Carolina
Wayne Brown is in Ft. Worth. He can hook you up with what you need. Go with a factory engineered system. Way less trouble, not the cheapest, but the best way. https://therammaninc.com/products/E-BODY-148

Re: Question 426 Hemi Brake Booster offset in 70 Challenger [Re: Texican] #2959281
08/31/21 01:18 AM
08/31/21 01:18 AM
Joined: Jan 2003
Posts: 8,016
Polson, MT
DoctorDiff Offline
master
DoctorDiff  Offline
master

Joined: Jan 2003
Posts: 8,016
Polson, MT
I make a new hemi booster assembly. See below:

https://www.doctordiff.com/bendix-style-dual-diaphragm-booster.html

Re: Question 426 Hemi Brake Booster offset in 70 Challenger [Re: 469runner] #2959288
08/31/21 03:48 AM
08/31/21 03:48 AM
Joined: Jan 2003
Posts: 6,389
Abilene, Texas
F
fastmark Offline
master
fastmark  Offline
master
F

Joined: Jan 2003
Posts: 6,389
Abilene, Texas
Originally Posted by 469runner
Wayne Brown is in Ft. Worth. He can hook you up with what you need. Go with a factory engineered system. Way less trouble, not the cheapest, but the best way. https://therammaninc.com/products/E-BODY-148


Why in the world people still recommend this clown is beyond me. DON’T deal with him. Do a google search and see the negative feedback on him. If you don’t believe me, call Frank Badalson and see what happened to him when he bought a e body hemi booster from the rammer man.

Yes, you need a special offset bracket and booster. Don’t bother trying to find an original factory one. They are impossible to find. I just sold one and they are very expensive. The factory one requires a Hemi only booster and a Hemi only bracket. If I read your post correctly, you don’t have a real hemi car, you just are putting a hemi in your car. So, just buy the reproduction one from DoctorDiff. It works fine and 99% of the people can’t tell the difference. It’s much cheaper.

Re: Question 426 Hemi Brake Booster offset in 70 Challenger [Re: fastmark] #2959306
08/31/21 07:53 AM
08/31/21 07:53 AM
Joined: Jan 2003
Posts: 3,000
Long Island, NY
shakerjoe Offline
master
shakerjoe  Offline
master

Joined: Jan 2003
Posts: 3,000
Long Island, NY
Absolutely agree here…fastmark has given you the best advise you’ll ever hear. Stay away from ramman, go direct to dr. diff. You’ll be miles ahead in quality of parts and no aggravation.

Re: Question 426 Hemi Brake Booster offset in 70 Challenger [Re: shakerjoe] #2959335
08/31/21 09:17 AM
08/31/21 09:17 AM
Joined: Jun 2014
Posts: 1,321
VA
D
dragon slayer Offline
pro stock
dragon slayer  Offline
pro stock
D

Joined: Jun 2014
Posts: 1,321
VA
You should be able to find post to explain the differences on a real hemi booster. Stud pattern and size. Unique and hard to find bendix MC for E body, and the hemi offset brackets. Believe DR Diff uses the non hemi booster bolt pattern and booster arm, but he can confirm
that.

If your a disc brake E body with orig KH set up you can certainly go with the 70 B body master cylinder. Slightly different shape but 1 1/8" bore and the 70B used the same disc brake hardware as the E body (70-72 B/E).

Now if your manual drum you do not need the offset bracket, and that makes it a lot easier on engine maintenance.

Re: Question 426 Hemi Brake Booster offset in 70 Challenger [Re: fastmark] #2959470
08/31/21 12:55 PM
08/31/21 12:55 PM
Joined: Aug 2003
Posts: 1,547
Mattituck NY.
FJ6AAR Offline
pro stock
FJ6AAR  Offline
pro stock

Joined: Aug 2003
Posts: 1,547
Mattituck NY.
Originally Posted by fastmark
Originally Posted by 469runner
Wayne Brown is in Ft. Worth. He can hook you up with what you need. Go with a factory engineered system. Way less trouble, not the cheapest, but the best way. https://therammaninc.com/products/E-BODY-148


Why in the world people still recommend this clown is beyond me. DON’T deal with him. Do a google search and see the negative feedback on him. If you don’t believe me, call Frank Badalson and see what happened to him when he bought a e body hemi booster from the rammer man.

Yes, you need a special offset bracket and booster. Don’t bother trying to find an original factory one. They are impossible to find. I just sold one and they are very expensive. The factory one requires a Hemi only booster and a Hemi only bracket. If I read your post correctly, you don’t have a real hemi car, you just are putting a hemi in your car. So, just buy the reproduction one from DoctorDiff. It works fine and 99% of the people can’t tell the difference. It’s much cheaper.

I agree with fastmark, do not call the ram man - very dishonest person.


1970 Hemi 'Cuda hard top clone

1971 Hemi 'Cuda Convertible clone


Re: Question 426 Hemi Brake Booster offset in 70 Challenger [Re: FJ6AAR] #2959472
08/31/21 12:56 PM
08/31/21 12:56 PM
Joined: Sep 2003
Posts: 19,355
north of coder
moparx Offline
"Butt Crack Bob"
moparx  Offline
"Butt Crack Bob"

Joined: Sep 2003
Posts: 19,355
north of coder
just listening to his videos does it for me. down
beer

Re: Question 426 Hemi Brake Booster offset in 70 Challenger [Re: moparx] #3057760
07/09/22 07:47 PM
07/09/22 07:47 PM
Joined: Jan 2007
Posts: 531
Charlotte, NC
Kowal Offline
mopar
Kowal  Offline
mopar

Joined: Jan 2007
Posts: 531
Charlotte, NC
I know an older post, but it just came up in some research I was doing. I have worked with Wayne the RamMan four times, twice in the past three years, each time the work was excellent and fast. Both the recent jobs included the refurbishment of a booster (one a Hemi), one included a Master cylinder rebuild and the other was me buying a very rare Master Cylinder from him. I just thought I should add my experience to this thread.


'69 Hemi Charger 500, ‘70 U code Challenger R/T
(These and a bunch others at www.dkowal426.com)

P.J. O'Rouke: "The old car ran perfectly, right up until it didn't."
Re: Question 426 Hemi Brake Booster offset in 70 Challenger [Re: moparx] #3057790
07/09/22 09:20 PM
07/09/22 09:20 PM
Joined: Jan 2003
Posts: 15,315
Omaha Ne
T
TJP Offline
I Live Here
TJP  Offline
I Live Here
T

Joined: Jan 2003
Posts: 15,315
Omaha Ne
Originally Posted by moparx
just listening to his videos does it for me. down
beer

the name ram man does it for me whistling stirthepot popcorn

Re: Question 426 Hemi Brake Booster offset in 70 Challenger [Re: TJP] #3057972
07/10/22 01:07 PM
07/10/22 01:07 PM
Joined: Sep 2003
Posts: 19,355
north of coder
moparx Offline
"Butt Crack Bob"
moparx  Offline
"Butt Crack Bob"

Joined: Sep 2003
Posts: 19,355
north of coder
Originally Posted by TJP
Originally Posted by moparx
just listening to his videos does it for me. down
beer

the name ram man does it for me whistling stirthepot popcorn



talking to him at carlisle one year, he started to get a little "grumpy" with me when i asked him a simple question, so i just walked away. he may have needed products and knowledge, but i have enough things in life to deal with without adding dealing with him to the mix.
beer

Re: Question 426 Hemi Brake Booster offset in 70 Challenger [Re: moparx] #3058001
07/10/22 03:43 PM
07/10/22 03:43 PM
Joined: Jan 2003
Posts: 10,706
North Dakota
6PakBee Offline
I Live Here
6PakBee  Offline
I Live Here

Joined: Jan 2003
Posts: 10,706
North Dakota
I bought a "Hemi" booster from one of his eBay ads. It took forever so I inquired and was told that these take additional time, including painting, because they are Hemi. Okay, sounds reasonable. Then it arrived. The paint job looked like one from a graduate of the Stevie Wonder school of paint. I could have lived with that but the input pushrod looked like someone took a steel rod, a torch and a hammer, and made one. Couldn't live with that. One thing that's always been stressed to me is that you don't screw with safety or emissions and I consider this in the safety class. Told him I wanted my money back and I'd even pay to return it. He was not a happy camper but I did get my money back. Moral of the story: never again.


"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
Re: Question 426 Hemi Brake Booster offset in 70 Challenger [Re: 6PakBee] #3058066
07/10/22 09:18 PM
07/10/22 09:18 PM
Joined: Apr 2013
Posts: 71
Fort Walton Beach
M
mothermopar Offline
member
mothermopar  Offline
member
M

Joined: Apr 2013
Posts: 71
Fort Walton Beach
I purchased a hemi set up from him a few years back. He always seemed like you were an inconvenience the two times I called to inquire/ask questions about it. Installed the master cylinder and it leaked. Never again.

!


1969 Superbee, Hemi, 4 Spd, Supertrack Pack
2007 Dodge Ram 2500, 4x4, 5.9 Cummins






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