New Front End Power Brake Conversion Kit And Upper A Arms Suggestion

[1970GranCoupeConvert]

Greetings,

I am just now getting back onto the "Cuda World" after about 20 years so all of my Mopar knowledge is way outdated so I am hoping for a modern education.

I am currently running a front disc/ rear drum/ manual master cylinder system and I want to convert to power brakes and possible updated front suspension system while I am at it so I was hoping to get some suggestions from the Mopar Brain Trust.

I want the "stock" look but am not excessively anal about it but I certainly do not want anything "flashy" or modern looking with cross drilled rotors with red calipers and anodized crap...and...I also do not want to have the "bolt on adapter" brackets for the front discs.

I want to retain the stock ride height and would like some better high speed tracking so I might think about new upper A arms...however...I do not want to go with the polyurethane bushings because the ride quality suffers.

The car has stock 15 inch Rally Rims with firm feel power steering and the longer pitman arm.

The car originally had manual brakes with four wheel drums but the front has since been converted to discs (as I remember from 20 PLUS years ago) it was transplanted spindles and discs out of a 1973 barracuda (but not totally sure now). The master cylinder currently installed is the unit that has the large reservoir for the front discs and a smaller reservoir for the drums (see picture).

So I bought the Inline Tube conversion kit but I am rethinking moving forward with this system 1971-1974 Mopar B-body, 70-74 E-Body, Disc Brake Upper Conversion Kit because I tried to install it however the six holes on my firewall do not match the holes on the replacement bracket. So either they sent the wrong bracket or it will not work for my car. I am waiting for a call back from tech support.  Here is a picture

The system did not come with any instructions so I do not know how to connect up the linkage...IF...I figured out how to bolt the brake booster to the firewall.

Now that I go online I see that there are a couple of different systems available.

The Inline Tube system uses a black "Bendix Trapezoid booster" and that "looks stock" and it bolts up the booster and the master cylinder in a straight line with the brake pedal pushrod and then I see other units advertised have a dual brass colored booster that is mounted on a bracket that moves the master up and forward so it is no longer inline with the brake pedal pushrod.

www.carid.com
Master Power Brakes® - Brake Booster/Master Conversion Kit
Plymouth Barracuda 1970, Brake Booster/Master Conversion Kit by Master Power Brakes®. With prime disc brake conversion kits, why would you look elsewhere? CARiD offers a host of model specific brake kits and components by Master Power Brakes.
www.carid.com www.carid.com

What is best/ advantages/ disadvantages?

Are there stamped upper A arms available that increase the caster of the front end and look stock or do they have to be the tubular ? If so do you have a recommendation?

Also attached is a picture of my currently installed proportioning valve.  Does anyone recognize it?  I vaguly remember that it is for a front disc rear drum application but at this point I do not remember.

Any help and advise is greatly appreciated as I am just now starting to get back into my Barracuda after about 20 years.

THANKS,

Bill

(you can never have enough dancing bananas)

[Chryco Psycho]

you already have discs , you can go to the Cordoba rotors , 11.75" & use the same calipers , DR Diff has the conversion mounts to move the calipers away for the larger rotors .
The real issue you are struggling with is the booster , most of the weird looking boosters do not seem to do a good job in my experience , stock seems to be the best , go figure ! What I would recommend is Hydro boost , at least look into it , far better braking power without being vacuum dependent assuming you have power steering .
You can add the Moog offset bushings to the stamped upper control arms & increase the caster significantly that way just be careful installing them because the instructions included reduce caster !
Moog Part# 7103 is the part # for the offset bushings available from Rock Auto .