lots of weight can be saved with accurate petrol levels In the biking scene its very common for trackdays seeing the lads pumping out fuel measure and then back in again note it and off you go...
Q on the petrol issue and starvation: What happens say if you've driven around a track for a while and you take a lets say 45 degree corner following a straight and the car starves... could it be that it bogs down and "dies" for a minute, engine light on and then just recover and continue driving?
btw, what sump are you getting? (guess it's not a normal spacer)
What LSD are you intending on installing, hoping it's a UK one
fuel pumps sounds interesting... so I take it your car doesn't have a fuel return system with constant pressure in it ?
I also guess we're not going to see any install pics