Is an IVA test that bad? i mean, it will at least make sure these modifications are safe for the road? (assuming the testers will be fair and wont right off all modifications.)
Actually they don't test the modifications as such - they make sure there are no sharp edges and stuff like 'protective steering' but in theory you could go in with a V8 monster producing 500bhp and as long as the drum brakes all round meet the performance requirements for the vehicle weight it should pass!
It's about making modified vehicles safe.
See above!
That page has been updated fairly recently - it never used to say anything about the monocoque, just colour and engine!
If you fail the IVA you get put on Q plates by the sounds of it
If you fail the IVA your car can't be registered at all so NO plates. If it passes the IVA, it can be given EITHER an age related plate if it is deemed by DVLA that enough of the car is original but not original enough to retain it's old reg OR a Q-plate. If the car was tax exempt it will no longer be even if it's given an age related plate from '72 or earlier.
JR