good price for a 4 speed?

There are a few things that make the overdrive unit good and some make it bad.The 3.09 first gear is a stump puller,but there is a tremendous rpm drop at each shift there after. You can overcome this with a steep axle ratio. Overdrive units use the large 5.125-in diameter imput shaft bearing retainer. So you will have to produce the matching bellhousing. Definately need to do some reading before you make any 4-speed change.

Here is a great book with all the answers.

Good luck !