my computer is acting up so I'm going to split this up.
anyway to upgrade your fuel system you basicly through everything from the tank to the heads away and start over. I even replaced the pickup in the tank but that may be over kill for you.
first you need to come up with an electric pump, I am running an aeromotive A1,000 pump, but there are many options. walbro makes a pump that is pretty cheep and can do the job, some guys will run 2 of them or even 2 superduty pumps. you can also run a fass pump or airdog system and that will take care of your filters too, you just have to make shure you get a pump that can push around 60psi.
if you dont get a fass or something like that you need to get a filter. I am runing a filter setup off of an over the road trucks and mounted it on the frame.
after the filter feed the fuel to the back of each head. then run a return line out of the front of the heads to a regulator. and return the excess fuel back to the take from there
I built my fuel system in a hurry so it isn't real pretty but here are some pictures
my new sump
pump and filter
lines and regulator on top of my engine
^that is an H2E turbo by the way