They used that transmission in 81-86 Chevy trucks. I picked one up for $200 from someone that had too high a rear end ratio.

Chrysler designed them and used them behind everything from the slant six to the Hemi, passenger cars to 3/4 ton trucks. Ford did use them too, I've got afriend wih one in his truck. Mine has the Chevy bolt pattern. If I remember right OD is 26%. You will need a bell housing for the 465 for the for the input bearing retainer to clear. Here's a link for the Chrysler version.
http://www.slantsix.org/articles/4-speeds/ODA833fourspeed1.htm If you buy one get the shift linkage with it, they are very hard to find. Note that the 3rd and 4th shift lever on the tranny is upside down (or is down sideup :confused: ) a give away that is an OD.
Larry