if u want ur car up and running quick, you wouldnt be stepping near a motor from an evo 4, 5, 6 etc etc. :wink:
if you definately want a quick swap, you'd be looking for the same motor you currently have (replacement). ideally if you had more time perhaps a rebuild, because once you get a replacement 2nd hand motor, it already has kms on it and will never know the true history of it, but yeah if you just want it running, look for the same type of motor as currently in there