The JDM 7M's have all the same equipment except they do not have the EGR system (they should have kept it as it creates lower combustion temps and thus you can apply higher boost and advance the timing even further without knock!) and I believe the oil pressure sender is different. If you don't have the BVSV or charcoal canister I highly recommend you repair/restore that system. It serves a few purposes, the pressure regulation helps prevent the fuel pump from caviating (deteriorating) and also from working harder than it needs to.
The sensor locations didn't really change just one spot was added.
Here are most of the ventilation and vacuum hoses; the only ones you probably aren't going to have are the couple used for the EGR system.
http://www.cygnusx1.net/Supra/Librar...spx?F=1201&P=2
http://www.cygnusx1.net/Supra/Librar...spx?F=1708&P=3
http://www.cygnusx1.net/Supra/Librar...spx?F=7701&P=2
Heater VSV and Control Valve:
http://www.cygnusx1.net/Supra/Librar...spx?F=8717&P=1
EGR; if your EGR system is present you'll see these components and you'll find the vacuum lines in the first diagram above.
http://www.cygnusx1.net/Supra/Librar...spx?F=2501&P=1
If your sensors are in different locations you need to make sure they're all at least on the correct side of the thermostat.
The injector impedence is an N/A only thing... unless you're putting N/A injectors in a GTE it has nothing to do with a GTE their injectors were the same. NOTE: If you are, for some bizarre reason, wanting to install N/A injectors in a GTE you need the YELLOW topped (see: low impedance) injectors.
Post some pictures of the things you have questions about and I'll see if I can be of assistance.