Dana 60 you couldn't just swap the pumpkin, but they are bulletproof and I ran those in my 73 charger and 69 dart.
I run 5.14's in that 1970 Hemi Cuda with 15x33 Goodyear Eagles, hell, you can turn that little 509 Keith Black 9000 rpm's, the sheet metal tunnel ram and alcohol Hat Injector like the RPM'S!
