Thanks for all your kind words.
Todays progress is as follows-
Welded up the base of the plenum, which ment that I could bolt the trumpets in for good and tap and drill the base for fitment to the inlet runners.
I also modified the Willwood dics to fit under the 15 inch alloy. I am down grading my 16 inch OZ ultraleggeras for 15 as they offer a better choise of rubber.
The calipers and disc just fit under!!!
Simon.