I have the Hurst Blackjack on my Magnum, it aligns in the stock console well and shifts great but it's leaking out of the top ball, the issue IMO is assossicated with cutting out and reusing the internal Tremec rubber boot per their instructions. They say there may be an internal drain in the upper shifter housing that's clogged but I haven't had time to tear it apart and verify if thats the case.
Unless they've addressed the seal design I'd probably suggest a different design.
Check out White lightning, adjustable spring rate, handle can be clocked in all kinds of different directions, short throw. Nice piece of hardware, I like it!