Originally Posted by
Horney
Wrong.
You are allowed to modify the car and keep it's plate unless you end up with less than 8 points on the points system. On a monocoque car those 8 points have to include the 5 for the car body. As soon as you modify the monocoque with tunnel or bulkhead changes it needs an IVA and a new reg.
Nick
What bit of what I wrote is wrong?
The only circumstances where you get 5 points for the shell is where you use the original shell or a new replacement shell.
If you use your own shell and sufficient parts (3 points worth) from the original car, you keep the original number
If you use a new shell and 3 points worth from a single donor you get an age-related plate for the donor car.
If you use a second hand shell and components from another car(s) you get a Q. Obviously, with the points from that donor car as well as the shell, you could get an age-related plate that refers to the donor.
Been there, done that, got the log book to prove it!