Cleanup turns to mess up. Need some help troubleshooting.

I have a factory service manual. I filled the tank completely just before startinf the break down and repaint. I operated the throttle linkage and saw it squirting fuel into the center of the carb. I had verified timing at 3 degrees btdc juat before starting this all as well as replaced the plugs/wires/cap and rotor. Eveything ran fine juat before teardown. It also fired right back up and ran fine for about 20 secs after i put everything back together.