Clod_King said:
those trucks still look mighty long. I want scotty to be shorter as it is, I mean k5 short (or dare I say... shorter...)
Well, those are regular long-bed crewcabs, which, for 73-91, is the only way you could get a crewcab.
For reference, there are a few different frame sizes:
K5 have 106.5" wheelbase and are 184.5" long overall, according to GM.
A shortbed pickup is 117.5" WB and 191.5" LOA, i.e. just slightly larger than the K5.
Burb is 129.5" WB and 218.5" LOA -- bloody great rear overhang on these, i.e. the rear axle is waaay forward in the "bed" as opposed to a PU or K5.
Longbed PU is 131.5" WB (only slightly longer than a Burb) and yet ~212" LOA, because they only have the one seat.
Crewcab monsters are 164.5" WB (

) and 244.5" LOA.
You could put a crewcab cab onto any chassis, I think, except a K5, with varying amounts of space for a "bed" ... I think a small flatbed would be best, at that point. I don't see a crewcab cab fitting onto a K5 chassis as, as others have pointed out, the rear doors would want to infringe upon the space occupied by the rear axle.
You could, if you were a sheetmetal genius, fold in the wheelwell like the four-door Tahoes do ... but that's crazy work.
-- A