Rims are too small

[Kevery]

So, I'll explain my situation and then my question. I have a dana 44 out of a 78 f250 under the front of my ranger with 16.5" rims. I have a dana 44 under my 79 bronco with 15" rims. The 15" rims won't fit on my ranger (too small). My guess is that the f250 came with bigger brake calipers because of towing etc.

My question is (and I guess I could just look) will my 1979 bronco front calipers bolt on to my 1978 ford F250 axle? Hmmm.