for a start, you'll need an open driveline, so a rear end change ... then some changes to the shift arrangement to suit the older truck/newer trans & the electrics .... also the Saginaw OD 3 speed started about '68, so you've likely got the BW, info here

Bill

Moved over to the Passing Lane

"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