Just as a post note - Stu was mega helpful on the phone!

I now have a plan!!

First - Sort out a few niggles on the car before Stu sees it (so he doesn't shout at me! )

Then buy the few bits and pieces that can be easily done 'down south' such as fuel pump and stuff like that

Then take the car to MSD for the final and definitive step (fingers crossed 380-400 BHP reliable)

Hooray for a plan!

escossie666 - dont want to speak for the experts, and I am sure they will respond, but from what I gleaned from speaking to Stu, it is all about the map. If you have the right fuel flow, and the map is telling the car to give the right amount of fuel, it shouldnt lean off! Best thing to do imho is test it with a wide band lambda (proper one) to see if it does or not!

Of course, the experts will tell you all.

JJ