Mr T - You are right, I did get the whole shell for less than the price I was being quoted for just rear aches.
So it is only lost time, rather than money, if they are the only bit I can realistically use.
If I now commit to using the rear frame work, I can safely cut the shell in two.
Although I'd still want to see what using the rear frame & Spitfire bulkhead would look like.
Although, deep down, I do not expect this to work is the way I originally hoped it would.
Then it will be back to the drawing board to make the original frame work fit/work.
But, as always, I will take comfort from all the modifications you have done to your car.
Cheers, Paul.