argh.... so you asking to be able to spot a adm made to look like a jdm trueno? check for all the usual things like wiring.. should look factory.check the vin plate, if its a adm vin plate then its not a factory trueno. the cluster surround should have four settings on the light switch for the pop up lights.
other give aways will be stuff like does it have a t series diff, jdm interior etc. also the windscreen on a jdm is longer. roof lining is different on jdm versions too.