the "correct" 4 speed would be the SM420 seen here, but why would you want to use a granny geared trans? find yourself an original overdrive 3 speed and stick to column shifting
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics