You are looking for a 78(?)-91 Chevy K30 or an m1008.
You should also read this link thoroughly. People have been known to swap 8 lug 10s/44s in to a one ton and sell the truck with the buyer thinking it had a 60 in it. The kingpin knuckles are the giveaway.
http://www.pirate4x4.com/tech/billavista/60_front/
There's a
ton of info on ck5 and pirate about which trucks have desireable D60s if you search.
[FONT=Arial, Helvetica, sans-serif]
OEM[/FONT][FONT=Arial, Helvetica, sans-serif]
Years[/FONT][FONT=Arial, Helvetica, sans-serif]
Application[/FONT][FONT=Arial, Helvetica, sans-serif]
knuckle[/FONT][FONT=Arial, Helvetica, sans-serif]
diff[/FONT][FONT=Arial, Helvetica, sans-serif]
gears[/FONT][FONT=Arial, Helvetica, sans-serif]
springs[/FONT][FONT=Arial, Helvetica, sans-serif]
width (wms-wms)[/FONT][FONT=Arial, Helvetica, sans-serif]
hubs[/FONT][FONT=Arial, Helvetica, sans-serif]
Splines[/FONT] [FONT=Arial, Helvetica, sans-serif]
(inner / outer)[/FONT]
[FONT=Arial, Helvetica, sans-serif]
approx spring pad span[/FONT][FONT=Arial, Helvetica, sans-serif]
Spring pad width[/FONT][FONT=Arial, Helvetica, sans-serif]
Calipers[/FONT][FONT=Arial, Helvetica, sans-serif]
Spindle bolts [/FONT][FONT=Arial, Helvetica, sans-serif]
pinion centerline to knuckle centerline [/FONT][FONT=Arial, Helvetica, sans-serif]
Chevy[/FONT][FONT=Arial, Helvetica, sans-serif]
79-87[/FONT][FONT=Arial, Helvetica, sans-serif]
K30[/FONT][FONT=Arial, Helvetica, sans-serif]
kingpin[/FONT][FONT=Arial, Helvetica, sans-serif]
pass.[/FONT][FONT=Arial, Helvetica, sans-serif]
regular[/FONT][FONT=Arial, Helvetica, sans-serif]
leaf[/FONT][FONT=Arial, Helvetica, sans-serif]
69.5"[/FONT][FONT=Arial, Helvetica, sans-serif]
internal[/FONT][FONT=Arial, Helvetica, sans-serif]
35 / 30[/FONT][FONT=Arial, Helvetica, sans-serif]
32"[/FONT][FONT=Arial, Helvetica, sans-serif]
3"[/FONT][FONT=Arial, Helvetica, sans-serif]
single piston[/FONT][FONT=Arial, Helvetica, sans-serif]
6 [/FONT][FONT=Arial, Helvetica, sans-serif]
88-91[/FONT][FONT=Arial, Helvetica, sans-serif]
K30 crew cab[/FONT][FONT=Arial, Helvetica, sans-serif]
kingpin[/FONT][FONT=Arial, Helvetica, sans-serif]
pass.[/FONT][FONT=Arial, Helvetica, sans-serif]
regular[/FONT][FONT=Arial, Helvetica, sans-serif]
leaf[/FONT][FONT=Arial, Helvetica, sans-serif]
69.5"[/FONT][FONT=Arial, Helvetica, sans-serif]
internal[/FONT][FONT=Arial, Helvetica, sans-serif]
35 / 30[/FONT][FONT=Arial, Helvetica, sans-serif]
32"[/FONT][FONT=Arial, Helvetica, sans-serif]
3"[/FONT][FONT=Arial, Helvetica, sans-serif]
single piston[/FONT][FONT=Arial, Helvetica, sans-serif]
6 [/FONT][FONT=Arial, Helvetica, sans-serif]
Dodge[/FONT][FONT=Arial, Helvetica, sans-serif]
79-91[/FONT][FONT=Arial, Helvetica, sans-serif]
D-600 & D-700[/FONT][FONT=Arial, Helvetica, sans-serif]
kingpin[/FONT][FONT=Arial, Helvetica, sans-serif]
pass.[/FONT][FONT=Arial, Helvetica, sans-serif]
regular[/FONT][FONT=Arial, Helvetica, sans-serif]
leaf[/FONT][FONT=Arial, Helvetica, sans-serif]
67.5" [/FONT][FONT=Arial, Helvetica, sans-serif]
external[/FONT][FONT=Arial, Helvetica, sans-serif]
35 / 30[/FONT][FONT=Arial, Helvetica, sans-serif]
32.5"[/FONT][FONT=Arial, Helvetica, sans-serif]
2.5"[/FONT][FONT=Arial, Helvetica, sans-serif]
single piston[/FONT][FONT=Arial, Helvetica, sans-serif]
6 [/FONT][FONT=Arial, Helvetica, sans-serif]
92-93[/FONT][FONT=Arial, Helvetica, sans-serif]
D-600 & D-700[/FONT][FONT=Arial, Helvetica, sans-serif]
kingpin[/FONT][FONT=Arial, Helvetica, sans-serif]
pass.[/FONT][FONT=Arial, Helvetica, sans-serif]
regular[/FONT][FONT=Arial, Helvetica, sans-serif]
leaf[/FONT][FONT=Arial, Helvetica, sans-serif]
67.5" [/FONT][FONT=Arial, Helvetica, sans-serif]
internal[/FONT][FONT=Arial, Helvetica, sans-serif]
35 / 30[/FONT][FONT=Arial, Helvetica, sans-serif]
32.5"[/FONT][FONT=Arial, Helvetica, sans-serif]
2.5"[/FONT][FONT=Arial, Helvetica, sans-serif]
single piston[/FONT][FONT=Arial, Helvetica, sans-serif]
6 [/FONT][FONT=Arial, Helvetica, sans-serif]
85-88[/FONT][FONT=Arial, Helvetica, sans-serif]
DRW D-600 & D-700[/FONT][FONT=Arial, Helvetica, sans-serif]
kingpin[/FONT][FONT=Arial, Helvetica, sans-serif]
pass.[/FONT][FONT=Arial, Helvetica, sans-serif]
regular[/FONT][FONT=Arial, Helvetica, sans-serif]
leaf[/FONT][FONT=Arial, Helvetica, sans-serif]
75.5"[/FONT][FONT=Arial, Helvetica, sans-serif]
external[/FONT][FONT=Arial, Helvetica, sans-serif]
35 / 30[/FONT][FONT=Arial, Helvetica, sans-serif]
32.5"[/FONT][FONT=Arial, Helvetica, sans-serif]
2.5"[/FONT][FONT=Arial, Helvetica, sans-serif]
single piston[/FONT][FONT=Arial, Helvetica, sans-serif]
6[/FONT][FONT=Arial, Helvetica, sans-serif]
Ford[/FONT][FONT=Arial, Helvetica, sans-serif]
78-79[/FONT][FONT=Arial, Helvetica, sans-serif]
F250/F350[/FONT][FONT=Arial, Helvetica, sans-serif]
kingpin[/FONT][FONT=Arial, Helvetica, sans-serif]
drivers[/FONT][FONT=Arial, Helvetica, sans-serif]
reverse[/FONT][FONT=Arial, Helvetica, sans-serif]
leaf[/FONT][FONT=Arial, Helvetica, sans-serif]
69.25"[/FONT][FONT=Arial, Helvetica, sans-serif]
internal[/FONT][FONT=Arial, Helvetica, sans-serif]
35 / 30[/FONT][FONT=Arial, Helvetica, sans-serif]
31.5"[/FONT][FONT=Arial, Helvetica, sans-serif]
dual piston[/FONT][FONT=Arial, Helvetica, sans-serif]
5[/FONT][FONT=Arial, Helvetica, sans-serif]
85-91.5[/FONT][FONT=Arial, Helvetica, sans-serif]
F350[/FONT][FONT=Arial, Helvetica, sans-serif]
kingpin[/FONT][FONT=Arial, Helvetica, sans-serif]
drivers[/FONT][FONT=Arial, Helvetica, sans-serif]
reverse[/FONT][FONT=Arial, Helvetica, sans-serif]
leaf[/FONT][FONT=Arial, Helvetica, sans-serif]
69.25"[/FONT][FONT=Arial, Helvetica, sans-serif]
internal[/FONT][FONT=Arial, Helvetica, sans-serif]
35 / 30[/FONT][FONT=Arial, Helvetica, sans-serif]
36.5"[/FONT][FONT=Arial, Helvetica, sans-serif]
dual piston[/FONT][FONT=Arial, Helvetica, sans-serif]
5[/FONT][FONT=Arial, Helvetica, sans-serif]
about 3.5" more to drivers side than 78-79[/FONT][FONT=Arial, Helvetica, sans-serif]
92-99[/FONT][FONT=Arial, Helvetica, sans-serif]
F350[/FONT][FONT=Arial, Helvetica, sans-serif]
balljoint[/FONT][FONT=Arial, Helvetica, sans-serif]
drivers[/FONT][FONT=Arial, Helvetica, sans-serif]
reverse[/FONT][FONT=Arial, Helvetica, sans-serif]
leaf[/FONT][FONT=Arial, Helvetica, sans-serif]
69.25"[/FONT][FONT=Arial, Helvetica, sans-serif]
internal[/FONT][FONT=Arial, Helvetica, sans-serif]
35 / 30[/FONT][FONT=Arial, Helvetica, sans-serif]
36.5"[/FONT][FONT=Arial, Helvetica, sans-serif]
dual piston[/FONT][FONT=Arial, Helvetica, sans-serif]
5[/FONT][FONT=Arial, Helvetica, sans-serif]
about 3.5" more to drivers side than 78-79[/FONT]
Darn, the spreadsheet didn't work. It's near the top of the link I posted.
Tonnage is not very relevant to the payload of modern trucks, as the classes have become very conservative (probably from trying to outclass each-other's 2500 trucks). The nomenclature is more useful to describe the class of light duty truck. A new HD2500 usually has a payload of at least 2000lbs, but is still considered a "3/4 ton" truck class. The big three all generally use the same nomenclature to describe their classes, however...10/100/150/1500= 1/2 ton; 20/200/250/2500= 3/4 ton; 30/300/350/3500= 1 ton