I bought a new S10 fuel sender and then proceeded to chop it up. I am putting a pump from an '05 Silverado into it in order to get the needed pressure. I had to cut the bottom metal plate that the pump sits on since the "new" pump has a wider base. I also had to graft the electrical feed (harness) from the pump to the fuel sender.
This has been installed into the boiled out tank. I'm now working on bending/running fuel lines. I will be using a Corvette filter/regulator, so the return line (5/16") will feed back to the tank. I plan on keeping an evap system intact, so there will be a line running from the evap tank up to the purge solenoid, per the original LM7 setup.