price in 1985

This depends a lot on the definition of fully loaded. It was common for example to have different bumpers, some painted, some chrome, which could reduce or increase the final purchase price. That's just one option that most people don't realize when they look at a vehicle. Without a build sheet or option tag it would be hard to determine what the purchase price was.

is the f-150 an 1/2 Ton Pickup Styleside or 1/2 Ton Pickup Styleside Longbed or 1/2 Ton Pickup Styleside Supercab or 1/2 Ton Styleside Supercab LWB or