Escaper for 5

I have an '85 toyota motorhome that has had the rear axle upgraded to the 6 lug. The front hubs are still 5 bolt. I would like to change the front to 6 bolt so the spare will work all around. Can anyone tell me if the parts (front hub and brakes) from a 1991 toyota 1 ton will bolt on to my '85? I wasn't sure if the parts were interchangeable or not. I have called my local toyota dealer and two salvage yards, but nobody has been able to give me an answer. Thanks! Zak