Can you install a front bumper from 1989 Mazda B2200 to a 1991 Mazda B2200?

Yes you can.The 86-93 model Mazda b series trucks have the same bumper and mounting points while some designs are different in LOOKS like with chrome or trim on them.They are interchangeable.The end caps are the same except on the four wheel drive trucks(this is just specific to those).Ok simple swap is A OK!