There is a very informative article in the 1948- 60 forum about swapping out the rear axle in those trucks to a 1957- 72 F100 rear end. I have a 1946 ford 1/2 ton.My question is will the 1957-72 F100 rear ends work on a 1946 ford 1/2 ton pick up. Not sure if spring perches and pinion angle will be right or if axle hub to hub measurement will be OK. Any one have any info?

 

Well lets start out by measuring your current axle width from backing plate to backing plate.