Gear Vendors overdrive

I have one that I bought used. I'm running a 4:10 gear and 28" tires. I can run the freeway passing cars at about 80 mph just under 3000 RPM, or I can run in the low 70's mph at about 2200-2300 RPM.

Being a street strip car I like the 4:10 gear and the ability to lower the RPM on the freeway. For me that is the big benefit, you can actually drive your car and keep up with traffic on the freeway without the irritation of having to run the car over 3000 rpm on extended road trips.

I will say up in Vegas last month I did experiment with splitting gears on the 1/4 mile with no real improvement in ET or MPH.

As far as installation on my 68 Dart I opted to lower the trans mount 1/2" instead of taking a hammer to the floor board to make some additional clearance where the overdrive is located.