I'm pretty sure the single cab 22R 4x4's were available in both regular and long bed in 1985. I know for a fact that they were available in 84' because my friend used to have one. The long beds were 88 inches long while the short bed (what you have) was 76 inches long.
Yes, the long bed was available for the 2nd gen, but unlike the 1st gen, I think you had to order them that way.