streettweaked

So here’s the story…. I bought a roller rx7 about a year and a half ago and about 6 months ago I purchased a jdm motor from japan star or something like that. Anyways I noticed the plugs on the wiring harness were different from the regular yellow ones. These are white and bigger/fatter. And the dash harness won’t plug up to the ecu that came with this motor.

Long story short I found out they sent me the wrong year motor and I specifically asked for a 93-95 motor. This one is a series 7 motor out of a 96 or something like that I think and I’m trying to find out what I need to do/ get to make this thing work in my car. Can’t send the motor back cause it’s been too long.

I’ve searched for FOREVER on these forums for clues as to what to do because I didn’t want to ask without looking as so many people tend to do when their answer is so easy to find if they just looked, but it seems weird to me that nobody has done this before or if they have they sure don’t post how to do It because trust me I’ve looked.. This is what I’ve heard so far and some of these ideas conflict with each other so please correct me if I am mistaken and PLEASE PLEASE PLEASE add any info that you have that will point me in the right direction.

First opinion said the short block is the same, but you would have to change out everything else (e.g. manifolds, rats nest, alternator, blah blah blah)

Second one said all you need to do is just need to switch out the harness for a USDM one.

Third one said all you need to do is chop the plug on the JDM harness and splice in a connector from a USDM one. Leave everything else alone.
And I was wondering if maybe I could just keep everything the same on that harness and the ECU, get a 16bit PFC and just get a dash harness from japan…

Please Help Me!! I really want to get past this and move on to bigger and better things!

streettweaked

btw I just noticed that I accidentally posted this in the builds thread. sorry about that and I don't know how to delete it or move it.