Need some input...

Has anyone, or know anyone, who has tried a GearVendors unit. I have a 727 with a TF2 shift kit, 8-3/4 S.G. rear w/3.55 gears. Has anyone had any problems or concerns with this?

Would love to have an OD in my 73 Dart. Would prefer NOT to do surgery to fit a bigger trans in the tunnel. THe GV seems like it would be a good upgrade (3 gears to six with an OD) and more affordable than one of those Keisler kits.