i have a few questions about putting an 87 engine in my 89 supra, fist what should i do about motor mounts, i was planning on using my mounts but the engine also has the pre 89s on it so that wont be an issue, also i have the early 89 one peice harness, will it work w/ a pre 89 ecu and on a pre 89 engine or will that have to be changed?