You might want to try Mark Jeffrey at Trans Am Racing. He makes a GREAT dual/power master cylinder setup. He also is a dealer for SSB and others. You can e-mail him at taracing@earthlink.net
He also advertises in the Mustang mags (and is even featured in the mags with his car).
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347 (Coast High short block), 279/284, TFS TW heads, Stealth, 750 Holley, Flowtech hdrs, Dr. Gas X, 2 Chmbr Flowmaster, MSD 6AL-Dist.& SS coil, March serpentine pulley system, Art Carr C-4 (Soon to be a Richmond 6 spd), Currie 9" w/3.50, alum Drv Shft, susp mods, Total Control subframes & tower braces, Trans Am Racing power dual master, 4 wheel disc, 17x8 Torqthrust II's
Something up my sleeve
In a 66 coupe