Tall or Short 3/4 Ton Caps?

[Graham57a]

I ordered a set of four 3/4 ton caps off of eBay to cut and make front k20 caps. Two are taller in the center, and two are shorter, almost like a half ton cap. Diameter is the same, color pattern is the same, etc. Does anyone know the difference? Or if they will fit my truck if I cut out the center? I’ve got a 72 k20 all factory

[jocko]

Interesting, all the 12" dia caps I've seen look like the one on the right.

[factorystock]

The shorter 12" diameter caps are the first version used in early '69 only. Later '69 thru '72 3/4 tons used the much more common taller version. An oddity to have the concave center on these early versions, while the taller style had the convex center thru '72 I would say your set was pieced together from 2 different year 3/4 tons, by the photo I would say '69 GMC and '73-'75 GMC.

[davischevy]

That short one probably has been pushed in to make it concave. Here is a picture of my truck before I found a complete set of concave. The front is the taller later style and the rear is the shorter older style.

[52napco]

Originally Posted by Graham57a

I ordered a set of four 3/4 ton caps off of eBay to cut and make front k20 caps. Two are taller in the center, and two are shorter, almost like a half ton cap. Diameter is the same, color pattern is the same, etc. Does anyone know the difference? Or if they will fit my truck if I cut out the center? I’ve got a 72 k20 all factory

Sure is a purdy truck ....where did you find that ? LOL

[Graham57a]

Originally Posted by 52napco

Sure is a purdy truck ....where did you find that ? LOL

Blind dog finds a bone everyone once in a while lol

[Graham57a]

Originally Posted by davischevy

That short one probably has been pushed in to make it concave. Here is a picture of my truck before I found a complete set of concave. The front is the taller later style and the rear is the shorter older style.

I doubt it, here are a few more pics. Look like cherry original caps to me

[Graham57a]

Here they are compared to an “outy” 69-72 style cap.

Am I crazy for cutting these up to make front 4wd caps? Or are people actively searching for these short c20 caps? It doesn’t make a difference to me but I hate to cut up a rare hard to find part if people are looking for them.

[jocko]

I learn something new every day. I'd have to imagine that the stubbys are very hard to find as 1 year only and GMC caps. Personally, I'd dig around for two more tall-uns to poke holes in. (I can't believe I'm saying this, but Chevs will work too for the poke outs)

[toolboxchev]

About 5 years from you will run into THE guy who will pay a premium for those 1/2 ton caps you cut up and are unhappy with.

That is where I guess they are from

[randy500]

I need some black tall center GMC caps
I would pay cash or trade you K20 cap cut and shape service on your caps or mine.
I dont think the low center caps will look right or cut and shape well into K20 front caps.

[factorystock]

Originally Posted by randy500

I dont think the low center caps will look right or cut and shape well into K20 front caps.

I agree, the short style always looked a bit odd to me also. I would definitely look for the taller style for a '72 K 20. Early '69 GMC 3/4 tons used the short caps on front wheels only, and the taller caps on the rear wheels to clear the Spicer axle. Chevy pickups had the same set up also, but came with the short style all the way around if it came with the Eaton axle. Later the decision was made by GM to go with the taller caps all the way around.

[weim55]

Originally Posted by factorystock

The shorter 12" diameter caps are the first version used in early '69 only. Later '69 thru '72 3/4 tons used the much more common taller version. An oddity to have the concave center on these early versions, while the taller style had the convex center thru '72 I would say your set was pieced together from 2 different year 3/4 tons, by the photo I would say '69 GMC and '73-'75 GMC.

I’ve never Heard of this oddball three-quarter ton hubcap before. My 69CST 20 shows an Assembly date of late August 1968 . Did Chevys use the short As well? Were they used on all four corners?

Steve weim55 Colorado

[Joesjunk]

I have an NOS Argent painted one. I had never seen another one, And I never knew what they went on