rollaman

Hey all ive got a 1990 corolla sx and i thought it was time to upgrade the motor cause of age. i am really keen to put the ae101 20v silver top in, is there any modifications i would need to make to the car to fit it?? am i able to just plug the new ecu from the 20v in or do i need to rewire it?? would be much appreciated if anyone that knew would let us know and any other information that i need to know aswell about the conversion