Thanks guys that's exactly the kind of theory lesson I needed.
I'm hoping because I have a fair few cubes that it will give me a better chance for the cam to act as moderate or mild creating the vacuum pressures required for easy tuning.
If this all gets too difficult there's always a tunnel wedge with a couple of carbs.
As for electrics - I'm leaning towards motec.
Just got to find the coin to afford it.
Sorry I can't offer any advise on the Mega Squirt stuff, it's beyond my knowledge, like most things unfortunately