X2 what the others said.
You need to do a basic inventory.
So that should you want to order a new chip - you can have a good sense of what you have.
The basic checklist is:
Injector Sizing
Turbo model and size
Intercooler type and model
Any TB mod
Torque converter stall type
EGR present, required for emissions - or no?
You can't neccesarily do much about what type of cam or internals - but you can pull a valve cover and see what your valve train is
A few of these things are irrelevent to chip design - but just good things to know.
Alky aside - a lot of things non-stock upgrades that get installed over the years - like Adj FPR; FP hotwire kits, Better IC's; Turbo Savers; larger DPs, Aftermarket Headers, Stiffer valve springs, etc etc - actually also offer significant improvements to the longevity of the engine or components.
Stock was OK - but it had some shortcomings.
Funny - since most guys go the other way - and scrimp and save to buy an Alky setup.
And even though you could just turn down the boost and not run the Alky - I suppose if you leave it dry and don't run it - eventually it will have issues. So - you could remove it and probably make a few coins selling it - if it is a current model more or less.