I am going to be buying a 94+ 12 valve reg cab 2500 rollover for a "project" and need to know what year to buy as far changes to the truck. It will be a 5 speed 4x4 and must have the dana 80 rear end. I will be bombing this engine and want the gov spring kit as well. I am fairly 12 valve illiterate and could use the help on any upgrades. Thanks in advance.