My 1980 Silverado C10 Big Ten was the HD half ton of it’s era. Big Ten meaning higher ratings than a regular half ton
It had 5 lug’s
My 1973 Chevy K5 4x4 was a shortened half ton and had 6 lug’s
Material science, manufacturing science and everything else has improved significantly
Found this chart and is about right to this discussion
https://www.oldride.com/library/1970_chevrolet_c20.htmlCheck out the 3/4 ton GVWR of 5,200 to 6,200 lbs, which by today’s standards is mid sized pickups to the bottom ratted full sized pickups
Chassis Data
Model Wheelbase Overall Length Front Tread Rear Tread GVW Tires
G10 90 in - - - 3,900 - 5,000 lbs 6.95 x 14 in
G20 108 in - - - 5,200 - 6,200 lbs 7.75 x 15
C10/K10 115 in 186.75 in 63.1 in 61.1 in 4,400-5,400 / 5,200-5,600 lbs G78 x 14 / G78 x 15
C10/K10 127 in 206.25 in 63.1 in 61.1 in 4,400-5,400 / 5,200-5,600 lbs H78 x 15 / G78 x 15
P10 102 in - - - 4,600 - 5,400 lbs G78 x 15
C20/K20 127 in (Longhorn 133 in) 206.25 - - 6,200-7,500 / 6,400-7,500 lbs 7 x 17.5 / 7 x 17.5 six-ply
P20 125 / 137 in - - - 6,500 - 7,500 lbs 8.75 x 16.5
C30 133 in - - - 6,600 - 14,000 lbs 8.75 x 16.5 in
P30 125 / 137 / 157 in - - - 7,300 - 14,000 lbs 8.75 x 16.5 in
Edit...
Meaning that the OEMs have/are playing mine’s bigger than yours and is a good thing for us consumers
Also, the supplier (AAM) to GM rates my 1996 GMC K2500 rear end at 10,000 GAWR, while GM rates it at 6,000 GAWR. It is also the same AAM axle assembly on the 1 ton daully of the same year and is also rated by GM at 6,000 GAWR. There are differences and that is in the MC bore size, wheel cylinder bore size and wider drum/shoes.
Ordered mine with the F60 (IIRC) option, which is the snow plow prep package, which got 1 ton front torsion bars on my 3/4 ton...and the wider drum and shoes