After kicking around many ideas I decided to go with an external surge tank and external pumps to feed the fuel rail of my rb25det in my 240z. I tried an intank fuel pump previously. The intank pump is the way to go for sure as long as you have adequate baffling and good general design. My problem stemmed from a poor design and using a rusty tank a buddy gave me. I started a thread on that.
http://forums.hybridz.org/topic/94261-bonks-efi-fuel-tank/
I will update that thread with some lessons learned soon.
Luckily I still had the original tank I pulled out of the car