Electric fuel pump questions??

[Telecasterjoey]

Hey guys so I'm in the middle of my engine swap and now I'm at another road block. I need to use an electric fuel pump because the 1990 block I'm using doesn't have a casting for the mechanical (trust me I'd rather run one) After a search on here I still have a few questions.. To run my rochester q-jet I'll need around 5 psi correct? If I run an electric fuel pump do I need the return line?
How hard are they to wire up? And does anyone sell the entire kit with an oil pressure safety switch? How do you guys run your pumps?? Lots of questions I know!

Here are some pictures of the swap so far.
Pulled the van 350 first, pulled the truck 305 now I'm just cleaning and painting everything.