Holy cow great info all around! That’s so much for the info on axles and codes! So my first vin reads U15FLC86688 below that reads
092 J U150 1 98 C 03
Welcome aboard!
And from your VIN, it reads:
U15 - U-100 wagon
F - 170 cid 6 cyl
L - built at Michigan truck plant
C86688 - Feb 1968 build date
Sounds like a nice find, I wish the rummage sales around here had Broncos!