Rear drum tight... Wrong brakes or axles?

I run 3.55s. They are a great street compromise gear. And on the street you will probably never have trouble with the 741 carrier. Just make sure the pinion nut stays tight!
And you do have a SureGrip in it right? And the center spacer better still be in there,lol. On the cone types, it's captured by the crosspin so don't sweat it if you have that.