'72 to '68 axle swap question.....

[MotorSeven]

Ok, i researched here and found that the 72 axles will be 3/4 inch longer than the 68. My neighbor(an old school Mech) says that they will work, soooo i pulled a pair out of one in a local bone yard. Yep, they are longer, however, the drum from the 72 is 3/4 inch deeper.
My question is : Can i slap the 72 drums on the 72 axle in the 68 housing? It seems to me that as long as the bearing surface mates up and the brake shoes are covered it should work ...right? Anyone tried it?
This is just a temp fix, because i want to get the truck on the road....my rebuilt 350 is sitting on the garage floor looking very lonely........Eventually i am going to put in a posi.

RD