I have just about changed everything and my car still has a miss.Its seems to run ok at wide open throttle but at idle or part throttle it misses.When I put my timing light on it the timing is moving about 4-5* at idle I guees from the miss.I have a 750 holley that I put a kit in but I dont know if there is an internal leak or some other problem with the carb.Most of the plugs are black so I know it is running rich.What in the carb would cause this problem?It also has a stumble just off idle.I have changed plugs,cap,rotor,coil,distributor,wires,I also changed carbs a while back with another used 750 vac secondary but I dont think that carb is very good either.My cranking compression is around 180 on all cylinders,which I thought would be higher with 11:1 pistons,is that about right?
Any help would be greatly appreciated.