1999 obs 2 door tahoe dash cluster

Hey everyone I am new here and need some help. First thank you for all your help so far just reading the forum has helped me out a lot.

I am the proud owner of a 1999 Old Body Style 2 door Tahoe. My issue is I am so confused for one I found out that 1999 is were they made the 1999 New Body Style & Old Body Style and I have the Old Body Style looking like the 1998 and lower. I don’t know if its an LT, LS or what it could be. On my title it doesn’t state this so I pulled it up in car fax and my insurance both say 1999 Tahoe C1500. The truck I purchased from my local dealership was painted black has shaved door handles and a few other mods. So I am unable to see any of the tags other then the Vin.Now here is my other dilemma I am going to customize this truck and do some mods and in Vegas there are few good strait up honest people who are willing to give the honest truth other then lying trying to make me there project. I am dying to change my dash gauges from the stock ones. I don’t want to just do the Blue LED’s I want to do something different Dakota digital wont work. I want to change the 100 MPH to the 120 MPH or even 130 MPH Gauges but of a newer year I called up DD instruments the cant help pointed me to Advanced Auto Electronics they can’t help. I wanted to eventually change out my computer but no one has ever heard of changing the computer from an older model to the computer of a newer. Does anyone know what gauges I can use or if there needs some custom harness or wiring and were I can get this done? I will include pics of what I have and what I am settling on because I am being told from everyone I am stuck and what I am settling on I am now being told I cant do that either can someone give me true honest information I would like to do the cluster of a newer 1999/ 2000/ 2001 style Tahoe/ Escalade I posted my pics below and in the next post are the new style cluster if you notice I don’t have the two smaller gauges to the left...Thanks in advance

These pics below are of My Truck

Since I can not go Digital... I wish I wish I wish I could lol

This is What I would like these are from the 1999-2002 New Body Style Tahoe/ Escalade

I am unsure if the images came through I am at work and not on my home computer and to me I see all the HTML codes and my post bunched up together if anyone else sees this the same I will re post and apologise for the issue

Yup your post is all jumbled and here's the note at the bottom Please do not copy and paste from a rich text editor like Microsoft Word. Please copy and paste from a plain text editor like Notepad.

Change out what computer? The engine controller? If so, what kind of improvements are you looking for by doing so?

Honestly I am totaly unsure just wasnt sure if changing out the computer would be a big advantage or disadvantage or just didnt matter. I know due to the computer I cant go digital due to it but its ok I just wish I could do at least the 1999 -2002 new body style gauges Anyone know how this can be acomplished...

I am also looking into a programmer I have several in mind and will do a seperate post about that as well thanks again for all your help...