i know this sounds crazy, but...

what all would it take to lay 24's or even 26's on the back in a 93 pup? any ideas. the thought occured to me to ask and see if it was even possible.

you could tubs up to the bed rail  with the lowwest profile tire  and or do an IRS set up i would do both it think there is a PUP out in cali on 24's all the way around the shop doing it is call ACE somthing

would it be possible to run a strait axle instead of an IRS?

no there is no isuzu on 24s the one u r thinkn of is on 22s and layn pinch aces and eights was buildn it, im running 20s w a big tire witch is the same size as a 22 and im a inch into the rocker. so it just depends on how low u want to be it might be possable.

If its not body dropped it is deff possible. All you gotta do is a cantilever setup like this to get enough lift. This is Josh's ISUZU rear setup ,flat rocker on 20's.