Any early square body 1 ton Napco trucks out there?

[1966 K10]

Ive seen mid 70s medium duty Napco trucks and was wondering since GM did not produce K30 til 77 was a light duty C30 conversion offered for 73-76?

[LONGHAIR]

I had a '74 C30 that was converted to 4x4 by the previous owner.
454 with a Predator carb, 4 speed, NP205, D44 Tru-trac front, D60 Detroit rear, 4.56 gears, and a really grippy metallic puck-style clutch. The guy originally built it to do truck pulls at county fairs, so it had smaller tires when I got it. 35" Ground Hawgs.
I traded for a set of 40" Regul Trailblazers. Of all weird things it had 15" wheels, you 8 lug 15s. The only reason it worked was the offset of the Jackman wheels.
The more common American Racing wheels on the back would not fit the front.
It was badass, but couldn't pass a gas station. Good thing that it was right around $1 back then.
Sadly, this is the only pic I still have of it.

[special-K]

That truck is a C30 converted to K20. I imagine someone could have ordered a conversion from NAPCO for a 73-76 C30 but never seen one. Good question.

I'm curious about when Ford began offering the 4wd F350. I know Dodge offered W300s from way back into the '50s when you had to convert any GM or Ford, even 1/2t & 3/4t. I'm thinking, all but the diehard GM customer would likely just buy the brand who offered the 1t 4wd. But knowing there were pre-73 NAPCO conversions on C/30s it goes to figure there should be some 73-76s as well

[57taskforce]

Tim, on the junky ford stuff… pretty sure it was ‘78 or ‘79. I’m leaning toward ‘79 Being the first factory 4x4 F350, if memory serves me correctly.