FWIW, the Ford Courier was a Mazda rebadged.
Around that time, Chevy had the little pickup "LUV"
Was an Isuzu.
Chrysler had the Mitsu's ie: Ram50
The big three all had Japanese PU's then so as to get into the market quickly.
Ironically, the Japanese are using the american iron quite a bit for there stuff now, IE Mazda B series is a ranger, Isuzu uses S-10.