Here is my pick. I'm old school and still like lots of rubber and 15" rims. These are 285-70-15"s on 10" rims( no rubbing Issues) Frt's are 255-70-15's on 8" rims
Truck Has 3" drop spindles with 2 in drop springs. Rear has a 4" drop spring with a 2" spacer.
Better pics at
www.classictruckworld.tenmagazines.com
Go to gallerys,then1968, mine is the BCHN-68 gallery.