I have a 83 Hurst Olds with 307 HO. Problem after I run it for awhile enough to get it hot let it set at a show for a couple of hours and very hard to start. Chugs,coughs ,spits sputters and the like. Carb has been rebuilt 2 times by 2 different professionals. All parts inside distubitor are new wires and plugs are also ne. When it starts iy always smells like gas and acts like a have a very wild cam.