This may have been asked or may be obvious but after reading this whole eight page thread, i could not find much on the ECU to use and the Wire harnes to use. the main post said thay didnt use the stock ecu or wire harness. ide like to know which ones were used. I plan on going the RB25det route and know about using the RB20det z31 j spec oil pan and sump. correct? the motor mounts ill buy from mckinney. getting the motor in and sitting is not the hard part. wiring is not hard either but not knowing the ecu or wire harness to use makes it a challenge. so far i assume to use the stock rb25 ecu and engine wire harness? does that just plug in or do i need to buy a conversion harness? or will i have to wire up the tach speedo temp ect my selp? I plan on getting the RB25det and dropping it in stock, not upgrading anything, just kinda wanna plug n play. I own a 73 240z and this is my first one and im gonna jump right to the rb25det engine. haha thanks in advance guys this site is super helpfull!