Help with body lift
 

I want to get a 3 " body lift for my truck. Its the old body style 2000 2500HD Regular cab 4x4. I heard you have to put a 1998 body lift on it because of the old body style or If you know where i can get one exactly for the truck that would be a lot of help. Ive looked at 4wheel online but they dont have one exactly for it. They all say non HD. Thanks.