Thanks Gary I did the calc (I remember doing the proof a long long time ago!) but I like to refer to the forum as a belt and brace!
I will explore the led option for the instruments.
Then it's 'just' a case of tidying up the wiring for the extra must haves ie AFR, USB etc etc. Plus of course finding the missing door interior light switch bit.
As always I'm most grateful for everyone's help. It does make a difference when tackling something you've never done before.
Iain