Toyota 70 series & ARB winch bar

Should have added that you would still be better to wait till you have the thing in your hands so you can measure yourself and ensure it does fit as you would want.

Is it the 4 door, the Troopy or the Tray you are getting?

Don't know who told you the bit about the "Request to the Government" business, but its a crook of $hit.

The bar must comply with the relevant Australian Design Rules which state things like.

The bull-bar shall follow the profile of the vehicle to which it is fitted.
Fitting the bull-bar must not increase the width of the vehicle (excluding the mirrors).
Any sharp edges on the bull-bar shall be chamfered or radiused.
No open-ended frame members are allowed.
No small components (such as brackets) shall be attached to the front of the bull-bar.

Sharp edges and protrusions. VicRoads (in Victoria) specifies what types of edges on bull-bars are allowed, and how to fit items such as lights and fishing rod holders to the bull-bar. While these are similar to what appears in the Australian Standard, individual state roadworthy regulations must be adhered to.

Have a look here Site Link

The bar is NOT submitted for approval as you state, but must be built to comply with the published ADR.

The distance you require between the bonnet and the bar will be about 100 mm to 110 mm as previously stated

So its a 79 series.

Sorry Allan no it didn't.
Take a look at the Toyota web site here Site Link note the model designation TOYOTA LANDCRUISER 79 - Now have a look at the Troopy link Site Link damn well look at that it says TOYOTA LANDCRUISER 78 - and bugger me look at the 4 door GXL Site Link it says TOYOTA LANDCRUISER 76 -
As I have said they are generically referred to and marketed as the "70 Series" to cover the whole type range the individual model numbers remain the same as previous years.

I would suggest that if you examine your purchase contract it will show the model designation on it also.