As for fuel safe, not entirely sure. I'm assuming all cleared paint will hold up to gas splashes.
The only thing I would recommend doing is stick with similar brands. If you're running ppg clearcoar, use ppg paint. Same goes for the reducers/hardeners/flex agents or whatever you'll be mixing in with the paint. Many auto parts stores will actually sell their paint in an aerosol spray can. They'll mix up whatever color you're looking for. An old customer of mine had some crazy silver paint shipped in from Germany for his cuda and supplied some ppg reducer. I've never seen products fight each other like those had.
I'm anal when it comes to painting. I would definitely hit the thing with some sealer, then primer. Sealer is an added reassurance, as primer is porous. Don't want to have to let the thing sit in primer during the summer, the humidity could do horrible things to paint. Once the primer is on, sand everything down so that you're happy with it. Crosshatch as much as possible. Once the primer is applied, hit the thing with some 600 grit paper, apply second coat and finish up with a 600 grit wet sand and wipe down with some cheese cloth. Don't scrub the dang thing though, that stickiness isn't something you'd want underneath that nice ol' coat of paint. Blast the tank with a ground coat (very light dusting) before you start applying actual coats of paint. Helps the paint to adhere. I'd say 1-2 ground coats and 2-3 heavy coats. If you're feeling frosty, let the paint dry after your second heavy coat and wet sand that again with 600 before your final coat until the sheen is gone from the paint, just make sure you're using a lot of water. 30 gallon bucket full and a garden hose will do you just fine. This'll help to get that glassy finish without having to go too crazy with a buffing wheel. I would wet sand the clear with 1k, 1.5k, then 2k wet paper before buffing. Just be sure to get a solid amount of clear on that thing before you start buffing anything, wouldn't want to burn through that fancy paint work.
Just my suggestion anyway. The bikes looking good homie, can't wait to see it when its all done up! What color are you thinking?