You can download the IVA manual but it is mostly irrelevant to a production car. I guess if you do this frequently it is easy, you get to know what they are anal about… But I now have the piece of paper and await registration… A very long wait from what others have said.
I went with the petrol for several reasons. Firstly I wasn’t sure how easy the 1VD would be to get through IVA and the 1HZ would be retry much a non starter. (I would have bought an older 1HZ that only needed an MoT if I had been able to find a good one but I gave up the search)
Secondly I’m not really a fan of the 1VD, especially in the 70, for many reasons, one of which is it’s dependence on top quality fuel. I have the 1GR in my FJ Cruiser, albeit the later DVVTi version but it is a good engine, the SVVTi even stronger though a little less powerful than the dual. I love it and am definately a convert away from the diesels I’ve always had before.
On paper there is very little in the economy of the VDJ and the 1GR variants. I get between 20 and 30mpg from my FJ and don’t expect the Troopy to be much different.
The big disadvantage of the petrol is no option for factory diff locks but as it is cheaper to buy it about comes to the same thing to add a Harrop e-locker which is my plan.