If you're gonna find a clean 70s cab, then you're part of the world is the place to look for it and don't rule out buying a complete truck to get it. As for paying $500 for just a clean cab, a lot of us back east would without blinking twice if we could. I mean out here a clean cab is one that only needs floor pans and rockers.

The body line change was 81 which is also the year they switched from aluminum grilles to plastic ones and completely redid the dash / wiring / heater box.