What tranny is this?

caferacerx said
that is an A-body trans, the O/D trans uses a different bellhousing,
http://www.darkside.ca/a-4spd.asp
http://www.slantsix.org/articles/4-speeds/ODA833fourspeed1.htm
http://www.brewersperformance.com/
http://www.passonperformance.com/
floor hump also here
http://www.autobodyspecialt.com/

After accumulating all the parts, and reading all of that information over and over, it looks like I ended up with two big block A body four speeds, as they are 23 spline, with the 4.80 bearing retainer and have the large 308 bearing.