So i dropped the fuel tank in my 78 280z. Had it cleaned and lined.  
I shot compressed air through the fuel lines to get all the junk out. (which i think i did: no fuel or anything comes out of the line, just air) 
I need a new fuel pump, which i have already bought.  
So my question is: What do i do now? do I unhook some fuel lines and clean them more? Do i just go right ahead and replace the pump and put the tank back on? 
Thanks guys, 
Schoenmann12