ECM swap woes. No AC in a heatwave because of model year issues. Here's the fix for my 2003 Dakota

swap from an 03' ecm to a 01' ecm in my dodge dakota. sure why not. needed to get around the anti theft module. sure fire fix for that. then you find out all the little things that wont work when you're done. oil pressure guage no worky worky. ac operates on a different system from 01-03, who knew!! haha well i got the fix for this little gem!