Gear vendors OD

Has anyone put a gear vendors overdrive kit on a 1967-69 Dodge Dart? If so what rearend gears were you running?

I drove a car with one for a long weekend. It was just too little of a good thing with that set-up's overdrive ratio. I wish Gear vendors would offer in a deeper overdrive, but they don't.

I ended up using a built up 2004R, which has a .67 overdrive and a lock-up torque converter. Aside from that, it's also the best automatic transmission I've ever driven.