sorry if i'm posting this in the wrong spot, but i'm hoping you guys can give me some information, or point me in the right direction. is there somewhere that you can go and there is a list of body changes (when did they introduce a quad cab, when did they add the 4 full functioning doors) and interior room, head room leg room, etc. I had looked at a 97 3500 cummins extended cab, but didn't have the funds. i like that body style, but if it had the rear opening doors. i'd rather have a 2500 without the 8foot bed. I just want to make an educated choice on what i'm going to try and get.