I swapped some 95? Sub buckets into a 91 extended cab with a bench once. They fit, but seatbelt was different, and one bolt hole on center consol didn't line up. Easy to fix, drilled a hole and tacked on a thick washer for a backup plate.
There may have been one other hole that had to be drilled for the passanger seat. I seem to remember the imprint in the floorpan, but the hole wasnt punched. Sorry it been 6 years or so.