-6AN or -8An fuel line?

-6AN is actually .34 or 11/32" hose, and -8AN is .44 or 7/16"
-6AN is big enough to feed your 650 and the 360 unless your going to spin it 7000 RPM for a while. Here is a link that explains it.

AN Fittings & Hose Sizes - Pegasus