Hi, I don’t know Tornado wheel setup, but I have 4in inset on my SGTs 8x15 & 10.5x15in
I guess inset depends on your KPI on your uprights and rear linkarms brackets onto rear upright.
Its probably close to GTD setup.
Yes, it will most likely be Image Wheels.
I had it on my super seven and have had a chat with Harry recently for my GT40 and inner measurement before ordering brakes. Indeed he and Image Wheels are helpful