If I had it to do over, it would be an M22 in the new case with the Italian gears. Let's see who can get the website first. I heard they had new ones for 1800. If numbers matching doesn't matter...
Complete new Muncie M22 1775.00 No core charge
http://www.tbtrans.com/muncie_4_speed.htm#new_unit
All of our Muncie units are built with the new muncie supercase,
super tailhousing, and the masiero italian gearsets, we also use the
new iron center midplate,along with the roller bearing sidecover
making this unit the toughest thing on the street!!!!!!!