i have a 1967 chevelle with a 327 in it. it had point distributor but i just change it to an hei (street fire). the car ran fine before the change now it runs ruff from 0 to 30 mies per hr. it feels like the motor is out of blanace. i set the timing change the plug wire and still have the problem. it is getting 12 volts and enough vacume. any ideas????
jeffriv