If you're gonna drop more than 3-4 inches, definitely use alternate shocks. You will also need to get a front end alignment afterwards. Otherwise, you will rub your tires bald really fast on the inside. Also, if you are planning more than 5-6 inches drop ijn the rear, you will need to check that your pinion angle is correct. Chances are, that you will need to correct the angle due to the change in height.
One other item would be to get new swaybar brackets for the front to help offset the drop. Early Classic sells them pretty cheap.
I think that's about it. Oh, when you get shorter shocks, just make sure they have the same load rating as the original or higher.
Good luck!
