yes it will be fine. there is only pressure BEFORE the regulator. the return line has no restrictions but the physical size of the hose.... pressure would never build in that line even if you were flowing 500lph. for your fuel pressure however, that could be slightly high, but nothing to worry about (1-2psi higher than normal.) and that's only because of the way the regulator works. it's just a simple spring along with a diaphragm that's pulled on by vacuum.