New fuel system for the Dart

Well the 3 week delivery time turned into 5 weeks. Then while opening the boxes which were in perfect condition, I found the tank damaged pretty badly. Hyperfuel is using Tanks Inc. tanks. I sent pictures of the damaged tank, and a new replacement was quickly sent out to me directly from Tanks Inc.. The new tank is in hand, I am now beginning the installation. I am in the process of fabricating a mount plate for the fuel pressure regulator that will mount it where the mechanical fuel pump would have been.

Last night while laying under car I was trying to determine best way to run return line to tank. My supply line is a 3/8" hard line which was newly installed several years ago, and mounts in factory locations. My return line will be 3/8" also, I bought proper Red Horse braided hose, but am now considering making a hard line. Most concerning is how to get through/around the torsion bar cross member, as I would prefer not to drill it. Ideally, the best location for ease of install would be to drill a hole through the cross member just below the supply line routing holes. Knowing this is where the cars weight is carried, this makes me nervous, as I would be putting holes 1.5" from torsion bar sockets. Am I overthinking this as usual? Additionally, the idea of running fuel lines below the cross member is not appealing. Any suggestions?

I may call tech line today and ask if a 5/16 return line would be sufficient. If so, I may be able to sneak the return line through the existing holes where supply line goes through.