well its easy Powertrain is diff

a ford tarus is crap but a ford crown vic isnt

They are very diff cars
Think 3d for a second if grand ams suck well of course so do trans ams and gtos and g8's Do you get my point here

Grand prixs are easy to work on easy to mod dollar;hp;mod ratio is decent and they are cheap to insure The 3.8 isnt bullet proof as some say BUT is reliable dependable and can handle some abuse

Just my .02 cents