Eh, I wouldn't base anything off of that. People out there seem to get a lot of bogus information about these things, and stick with it.
I remember awhile ago someone on ebay was asking an arm and a leg for an 88 because it was 'the last year they made them'. Several people on here messaged him informing him he was wrong, but he didn't believe us.
Only the longbed was available in 86, but since it's a 4.0, it's not an 86 unless someone swapped it in.