That won't be a issue as I purchased (2) pre-made 14' lines because I didn't want to deal the hassle of assembling and getting it wrong.
Right now I have the fuel pressure gauge mounted on the regulator, but it's only a 15 psi gauge and I don't know the specs on the regulator other than it is one for a carb set up, which is why I was thinking I should put my return line in front of the regulator inlet.