Does the aspen axle use the same style spring perches? If so then measure both axles center of perch to cewnter of perch and see what the difference is then measure width ouside of drum to outside of drum and see if it will fit.
Not if it is equipped w/the "iso-clamp" system. The perch will have a large 1.25"(approx.) hole in it instead of the small center bolt head sized hole. No matter, you'll be cutting
them off to move 'em in anyway, so weld the correct ones on when you do.