Mopar101

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I am just now getting back onto the "Cuda World" after about 20 years so all of my Mopar knowledge is way outdated so I am hoping for a modern education.

The car is a 1970 Barracuda and it 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).

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 **** about it but I certainly do not want anything "flashy" or modern looking with plastic master cylinder, cross drilled rotors with red calipers and anodized stuff...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 but stock length idler arm (is it worth swapping to the longer idler arm).

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.

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.

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

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?

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?

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

Mopar101

I also see master cylinders offered with different bore sizes from 15/16 up to 1 1/8.

Why would someone choose the larger size bore? Would not a smaller piston create more brake pressure for the given caliper piston.

I suspect that if you are running the dual caliper piston on all four wheels that you would need the extra volume but for my application of front disc and rear drum the 15/16 piston should be sufficient.

Mopar101

Also...here is a picture of my current proportioning valve. Can someone help me identify it?


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