My 383 running so rich,spark plugs are black,not wet just black soot[i think thats what u call it] when hot its hard to start. Now i have changed the dizzy to pointless new coil/leads spark plugs carby is a 4bl edelbrock---car seams to run ok also auto choke, dizzy does not have vaccum.......any help ps- when car is hot the only way to start is to hold throttle way open....