Hi, would an axle from an 85 fury 8 1/4 rear fit in a 75 duster?

Hello, I have a 75 duster and putting in a 440 with a 727 trans and I have the 7 1/4 rear in it now. I read somewhere that a 68 to 70 b body axle would work and bring out the wheels a little better. My question is I found an 85 8 1/4 rear out of a fury would that fit? Does anybody have the measurements from a B body 68 to 70 rear axle? Thanks, Dan