Re-drilling front drums?

Hi every one! This is my first attempt on a forum of any kind, I hope I'm doing thia the right way.

Because of the expense, I'm not ready to convert my '72 Dart to front disc brakes yet, but I would like to change it to a large bolt pattern set up. Can I have the drums re-drilled for a 4-1/2" pattern with 1/2" studs? The back is o.k. because I swapped axles to a 8-1/4".

Thanks, Vince