3/8" ID = supply
5/16" ID= return
a 24" piece of each should be sufficent for any trimming
mistakes.
94-97's have a 14" +/- supply and return. I slit the old ones with a razor blade and cut my new hose to to length from the old one.
98's only need a short rubber return line that's about 7" long, remove the fuel filter can and base from the intake for easy access. The supply is a "quick connect design. "