they sure will if you make em! lol. They should, but its possible there is a slight size diff. But under your carpet there should already be the holes drilled and tapped for buckets...
do you happen to know what other trucks will match up with a 91 mighty max. my seat is broken and I would really love to have bucket seats in place of the normal stock ones I currently have installed.
I'm not sure what seats will match up exactly but I have some seats out of a dodge neon that I'm getting ready to try and put in my truck. They look like they will work with little modification. You might want to try a set of those.