I've been investigated O/D options myself both for the 4 speed in the Roadrunner and the TF 904 in the Barracuda. I've heard nothing but good things about the Gear Vendors unit and if I decide I really need a steep gear in the car I'll likely go this route. But I think I'll more likely stay with either a 3.23 or 3.55 gear in the Cuda. The Roadrunner is getting a 4.10 rear gear so I'm either going the 5 speed O/D route or the Gear Vendors unit on the tail shaft of the 833 4 speed. Let us know what you decide, and how you end up liking it.