I actually put the Sag SM420 into the truck when I was sixteen
If Sag is short for Saginaw it shouldn't be used when talking about the SM-420...the SM-420 is a Muncie (SM = Synchro-Mesh and 420 is it's input torque rating).
Mike B
Mike Boteler
1956 Chevy 3100 Resto Rod 1952 Willys M38 Army Jeep 1983 Jeep CJ7 Laredo 1984 Jeep CJ7 +++++ Silver Spring, MD