[Cheesehead]

I am using the same EFI. Works great. I had to install a surge tank. Under hard acceleration (not too difficult with a Cobra) all the fuel in de tank moves to the back (the fuel pickup is in the front) and your pump (and engine) will run out of fuel. It happenend to me every time I had half a tank of fuel or less.

I am using a return to the surge tank. I have a pump (standard low pressure pump)to feed the surge tank. This surge tank has an overflow back to the main tank. From the surge tank the fuel goes to the EFI-pump and then to the EFI.
So even under hard acceleration or hard cornering there is always enough fuel.