Right, so you have a logbook with a Q registration and it says Mini Minus on it?
If so the shell and the V5 should have chassis numbers that match.
If they do you are quids in, no need for an IVA, just an MOT and away you go. Stick as many holes in it as you want. If turboing though I'd advise using the Mirage setup or a bespoke manifild to get the turbo in without the need for a box in the bulkhead. I did the latter on my kit car.
what does minus mean, ive never heard this before.
was it not built by rover, or homemade or something?
Does this help
Click me