9 1/4" Axle Swap?

close? no. you'll be miles ahead finding a mid to late 70's 9 1/4 diff. you still have to cut/jig/reweld housing, custom axles, etc. if your on a buget get a 8 1/4 diff. get som A/M axles, a suregrip, and you should be good to go as long as the car isn't to heavy.