Daniel, I had exactly the same issue. My tank is a fairly wide flat tank without any baffles etc.
Put in a surge tank and have never had a problem. My Surge tank is about 0.6L and I havent had any starvation problems even on the track.
The Low Pressure Pump is a Carter Lift pump and the High Pressure pump is a Bosch 044. I'd recommedn placing the Surge Tank higher thank the high Pressure EFI fuel pump as they dont suck very well.
The alternetive you could do is to put in a late model pump from say a VE commodore that has the surge tank, fuel sender and fuel pressure reg built in. You just need a deepish tank.
Below is a plumbing diagram of what I did. (there a copy in my gallery) Cheers Gregg
