Depending on your exhaust system sometimes you can bridge the terminals on the starter with a screwdriver while advancing the dizzy, when it loads up retard it back a little.
Fuel is fresh and clean, filter has maybe 500-600 miles. If it isn't going to react to carb cleaner (very volatile), I don't see it being fuel issue. I've seen motors run on stink gas (not very good mind you) my gas doesn't stink. Its maybe a month old.
I have a remote start switch (said that already) just didn't have it with me on the side of the road. I had my dizzy wrench though (still tuning). This time I advanced the distributor to the point that it kicked back on the starter, backed it off and it didn't start. Quick easy way to rule out timing.
