I have a 351w,mild cam, holley 770, msd distr, with vaccum, I have a dead miss at about 4500 rpm.
Engine with 1800 miles, 15* initial timing ,21* mechanical timing. Timing light @ 4500 rpm said 50*
Msd distr has 21* bushing in it. All parts are new. I can disconnect vaccum hose, plug carb no miss what gives?
Do I run with no vaccum or do I have a problem with distr? Plan on changing carb to Quick Fuel and adding NOS in future. How much timing does vaccum add to total timing? With vaccum plugged off 36* to 6000 rpm runs good......