[rotorwrench]

My 69 el Camino came with stump puller rear gears in a 12-bolt but it's an automatic T400 set up. It's rpm is way up there at 70 so it'll get an OD trans one of these days. Since it's a light pickup and I generally only use it around town, I won't mess with it for now. Some day maybe?

They don't go real fast but they get up to speed real quick as long as the tires will hold it!