Same here. Most people nowadays are strictly talking about D60 fronts. When I talk about D60 it is rear because I have that, not a D60 front.
Ive only owned 2 wheelers, elaborate on king pin caps??
Take note of the 4 bolts holding the cap down.
The cap is what traps the kingpin, bushing, and spring all together.... Which in turn holds the knuckle to the axle tube.
The lower kingpin looks different, but still the same 4 bolts holding the cap on.
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Some early dodges had them.
Like, some of the super early 60's ford's had them, the most commonly Known ford's were 76-78ish, 87-91.5.
And Chevrolet used dana 60 from 73-91 in 1 ton (I think) although I have seen early 70's squarebody k30's with a dana 44 in the front.... So I'm not 100% on that.
Only other axles I know of that use kingpin is Rockwell 2.5 ton, 5 ton, and axle tech and meritor, Clark, Pettibone, and many of the other HD axles rated 1 ton capacity and up.
When you get Past 1 ton, cheesy nylon bushings aren't used anymore. But rather bronze, brass, etc etc.