70's Demon 8-3/4 fit in 63' Dart?

[luvbeer35]

I'm looking to replace the 7-1/4 in my 63 dart GT convertible with an 8-3/4 from a 70's dart/demon. Bolt pattern is the same but not sure about the overall length drum to drum, leave spring location, and drive shaft length?
Thanks for the help!

 

[mopowers]

Driveshaft will need to be shortened, Other than that, it should be a bolt in deal. You do need the right lower shock mounts though because the tubes on the 8.75 are larger than the 7 1/4.