My Baby wont start unless I prime her with gas through the carb first, then she runs fine... I have been told it could be the O2 sensor, fuel regulator, even the thermostat so I dont know where to begin. I did remove the thermostat because it was sticking and never replaced it. I am old school. I need help with this one.. whitemfox@yahoo.com

 

Search around here a bit. The first thing you should do is perform a Fuel Pressure Test.

I would reinstall a new thermostat, your engine is looking for a particular temperature for it to run properly.