Hiya mate, yeah mine has the boost light and not the gauge. I can't remember about the other things you mention, its a few years now since I had the 165 lump in there.
Hope you sort it though fella
I have a load of jdm manuals if you need them, but I'm sure you probably already have them anyway 
Cheers Wiggy... actually i have very little in the way of info on the JDM 165 ( if any of your manuals have the ECU pinouts would be handy to look at especially on the little green light configuration ecu lol )
Mine at the moment is having a few starting from cold issues at the moment, taking longer to fire up and having to coax it a bit with throttle for first couple of minutes as seems to be missing,,, then its fine
Other than that i have to do passenger wing repair due to rusting a bit on there adn a few other little odds and sods
But is still the best Four for drivability and even looks in my opinion