This listing is for one new 4 speed tranny case. Made by RevTech and sold by Custom Chrome. RevTech part number 58300. New in the box with MSO for registration. Case has serial number for loss prevention. Cast from 356-T6 aluminum, this case has extra wall thickness in stress areas and extra support webbing in primary tab locations. It uses 1952 thru 1979 ratchet tops, loose needle roller bearings and stock or aftermarket hardware and gears. The main drive gear bearing race is install and precision sized for standard rollers (9084). Perfect fix for that cracked or welded case.