S4 to S5 conversion???????

i am the proud oxner of an 1987 rx7 turbo (my first 7) :), and i am wondering how complicated the conversion is to the series 5 motor? if i get the the motor, wiring harness, and ecu.... what else will i need? i heard that the air flow meters are different, but that is all i know of. any help that could shed some light is much appreciated. thanx for the assistance.

don't bother.

just get a streetported 87 engine. nothing wrong with it...

also the oil metering pump well the whole front cover will need to be replaced and the wiring harness will need to be altered.

not if you swap everything over