I just did a jdm engine install on my 96. My ecu is jwt so I can't help you there but basically we used the jdm engine and 40p heads with my cams from my 96 48p heads. The said basically the valve timing would not be controlled electronically like in the 96. The car feels stronger now. My torbos, hard pipes, bovs, exhaust, and cams. Just used the jdm long block and heads.