wow you are wet behind the ears. YOU ARE NEW TO CARS. if you think anything but a honda b or d series is going to fit in your rex for $800. anyway if you were not new, you would know it only takes imagination to know that you can stick anything under the hood. basically anything that will fit between the shock towers, and have the money to fabricate the mounts and other parts need to get the motor to run. i see you failing and going back to what was in the car to start or selling it to some one who knows what they are doing, and them sticking a b20/vtec under the hood and slapping some seriouse @$$ on some body like you who wants to stick a mitsu motor in a honda. laughing my @$$ off at you right now just cause you asked a stupid question before using the search button, then stuck your foot in your mouth.

lesson:
-remove foot from mouth
-look first then ask if you can't find the answer
-don't defend yourself if you ask a stupid question and get a stupid answer
-remember most guys responding in this section know what they are talking
about and will be able to spot a newbie (to cars) in an instant.

lesson learned.