plugs arent the same and the digital has two seperate plugs that connect when the cluster is pushed in , the analog has one that it pushes into and then the tach/boost module connects to a separate plug on the radio side
if its digital and you want to convert you'll need to get the plugs repin the digital to that of the analog .
and the analog has a different calibrated sender in the tank
digital has a 0-120ohm sender and the analog has a 0-90 ohm sender
for the boost gauge to function you need to install a map sensor under the hood inplace of the digitals boost hobbs switch
easiest way is get a dash harness from an analog turbo car and swap it
then just bolt the analog dash in, change the sender for one of the new repop ones (under 130bucks) and if you want boost to work install a 2bar map sensor