I have a 1990 f150 4x4..its got a 4'' lift with 35'' Baja claws...this is a mud truck only I don't drive on road anymore..i am wanting to beef it up a bit by putting 3/4 or 1 ton axles under it..i need some advice on what might be a good year to look for the axles and what would need to be done to complete the swap...thanks

 

The Bronco crowd has an entire forum dedicated to this subject: Solid Axle Swaps - FSB Forums