My father had the Hurst setup is his 69 Z28 and also his 79 Trans Am collector's edition (the silver one with the bird on the hood). I actually might buy him one for his LT4 Vette for Xmas this year...
Anyway though if you already have the Tri-Ax its a good shifter but, again, the MGW is going to be the best one and they've got the new style handles where you can put the shift knob pretty much anywhere you want.
2000 Mustang GT Steeda #0048
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.