I did the only sane thing to do and grafted a Muncie handle to a Hurst box. If you intend to drive your car, as we do, the Muncie shifter is a bad idea. A missed shift or two gears engaged at the same time can get very expensive. From what I gather, the repros are no better than the originals. A shifter that works, can't be that hard to design. Hurst has been doing it right forever.
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Chevelleless after 46 years......but we did find a low mileage, six speed, silver 2005 Corvette. It will just have to do for now.