1) step-sides are 6' beds (also referred to as shortbed)(2)thunder was some sort of a package, think i read about it at
www.rangerstation.com somwhere, have never seen one, may have been a reginol thing(3)could be part of the forementioned "package"(4) might be, my '88 had a factory sunroof. it could also be part of this "thunder" package/trim level. all in all a cap for any stepside ranger should work, the ones for the normal styleside box however woudlnt work. (although if i found one cheap enough and was in that situation, i would use 2x6 lumber to make up for the space diffrence, had to do that on a full-size once) heres that link to trs i saw->
http://therangerstation.com/forums/s...ead.php?t=5592