I have an extra 1968 - 31 spline posi unit for sale . It fits the one year O-axle for the A body performance axles . It uses the 3:42 and up ring and pinion ,it is number 672 , .. It has very nice clutches and is in excellent condition , no wear on the bearing registers . Asking $300 plus shipping . Thanks BOB

 

would this work in a 70 with a 3.23 gear ratio?

 

No,wrong ratio,and 70 is 28-spline.

 

Bob,
Is the cross shaft bore nice,not oblong or sloppy?

 

This unit was in excellent condition , no sloppyness anywhere . . This unit is sold . BOB

 

Somebody got a heck of a deal! Those 672's are pretty rare nowadays.