Calflash,
You have to use a 2-part clear if you want it to last. You will also need to sand away to bare metal around the lip of the fuel filler cap, and where your petcock goes on. If you don't, then fuel will get under the edge and lift the paint up.
The 2-part clear is the only clear in a can that will hold up to gasoline. The others just plain and simple will not hold up. It is only $20 for a can of the spraymax, which is money well spent the first time you dribble some gas on your new paint job.
Good luck and post some pics when done.
Camelman