Torsion Bar Tension

I am attempting my first disc brake conversion on my wife's 74 Dart Swinger. I have the donor parts from a 75 Dart. Can someone PLEASE tell me any secrets that I need to know to make this as painless as possible. I have read and heard that it is necessary to relieve the tension on the torsion bars to get this done. What is the best procedure to get that accomplished?

Thank you in advance.
Author: admin