I have to bend the Victorian number plate (and now the historic number plate) to fit into the JDM rear bar. Pretty sure that makes it unroadworthy but it mustn't be checked often as it has passed 3 times with bent plates.

Yeah I've never really pushed the point to be honest but I have a mate who is a cop and he reckons it'd be unroadworthy for the simple reason of a road side camera has to have clear vision of the plates, so you're not allowed to modify them at all.
 
But, that's just one guy, I wasn't going to argue to the point haha.

Deevon
https://www.vicroads.vic.gov.au/registration/number-plates/display-of-number-plates
 
"If your vehicle makes it difficult for you to meet these requirements, you need to make them as closely as possible. "
 
Looks like he was wrong

 
No, he was right.  The rest of that link also says, "Number plates must be clearly visible from 20m at all points in the shaded areas marked "A".

'Must' is the word you need to obey, if you have bent them into a JDM slot and it can be seen/read by everyones favourite cameras and people you probably wouldn't have a problem, but if you have bent an angle great enough so they can't you're in the book. 
 
It also says - for people who may read, "You need to make them as closely as possible" as "Oh I can make my own" - this, "Unauthorised number plates
Displaying number plates that haven't been issued by VicRoads on a vehicle is an offence under the Road Safety (Vehicles) Regulations (except for 'home-made' plates on exempt trailers). This includes the illegal re-manafacturing of existing number plates issued by VicRoads in a different format, style or material" 
 
In NSW you can't bend a plate at all to fit, they call it, "Defacing the plate" 
 
People can always bring up examples where they went through an RBT site X amount of times and the police didn't say anything about the plates - but one day you'll have the pleasure of meeting a highway patrol/traffic cop who really knows the legislation, takes their job very seriously, doesn't have a sense of humour - and spots you out for a cruise in your garage queen. He yanks the plates off your car, gives you a stinging fine and loss of points - and then says as you don't have plates on your car anymore you can't drive it home and must have it towed. Then your breakdown service refuses to tow you as you haven't broken down but have committed on offence! Then the day really sucks.
 
So if you have a JDM bumper and don't live in a state where they make plates that fit i'd suggest you make some brackets to sit behind the plates so they can be nice and flat and seen by our friendly authorities. As I always go on about, keep your car nice and compliant with road regs, give the ticket writers less to write about for when that day does come - like I kept saying to a member here "Get rid of those blue LED's - you'll get fined" (he did eventually - fined, not rid of them…) some absolute traffic nazi goes all Rommel on your car... 

Locked On
 
 
Hower im pretty sure thr tail lights and centre garnish are from a later model ...
 
Does anyone know which model/ year came with "retractable mirrors" came in ,  as i have to find a drivers door master window controller and the wrecker asked if i had retractable mirrors ... i dont know if the 1990 GT jap import does..? 

Yeah those tail lights are from late 93 start of 94 onwards. Retractable mirrors were an option, not every GT had them  afaik. 
 
I think you'll be able to tell if you have retractable mirrors or not by pushing them in towards the car, if they go in parallel nice and easy - they are not powered, if they won't budge they are most likely retractable.  

Deevon

I know what you're saying but the only way to get a Victorian plate to fit would be to either get and ADM bumper or have a brack out side the bumper which would mean moving the lights too.

I'm not entirely sure but I don't think it's a fine. Pretty sure it's a canary and you just have to get it fixed and have VicRoads clear the canary.

 
Yeah I hadn't considered the lights. I know it's definitely a fine in NSW, three points as well. Fine is a big one too.

Opps, i've noticed the images have been automatically compressed so you can't see the text.
So you'll just have to take my word for it :)

BriP
also your gearbox code 734 is non-LSD. 735 is the LSD version


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E153/733 or E153/735 means that you car is quipped with a  Limited Slip Differential