Avanti did offer a dual master cylinder conversion kit. In 1984 while ordering parts, the Avanti parts guy, Mike Kornfeld, mentioned that Gene Hardig's daughter had a brake failure. Gene put together a converter kit to replace her booster/master cylinder with a dual chamber master, but without a proportioning valve. The instructions show a hand-written note "Parts List - To convert to late booster 68-72 w/o Proportioning Valve." The kit included P/N 1700556 Booster/Bracket Cylinder Ass'y, P/N 1701526 Brake Line, front block to Master Cylinder rear port, and P/N 1700935X Brake Line w/fitting 1561262 at top, to Master Cylinder front port. Price in April/1984 was $250.50 plus shipping. I installed it, along with the Brake Lite Switch Conversion Kit (see AOA #31) and changed over to Silicon DOT-5 fluid.
