Gear Vendors overdrive
I have one in my Duster
30" tall rear tire...4:30 rear...75mph @ 2400 rpm, the sweet spot!
I see used ones less than $1500 from time to time
I would buy one again. I slightly modified the tunnel to get it to fit as high as I wanted to keep the pinion angle on my rear end realistic.
FYI....it is NOT a soft shift....you now when it hits