In the original engine rebuild, the distributor drive gear was inserted not in proper position (about 3 gear teeth off). as a result one or more cylinders never fired, and some others misfired. really kinda incredible that it ran at all. Wes pulled the distributor and then reached in and moved that drive gear. He's a knowldegable 440 guy and knew just by looking that the slot the distributor shaft sits in was not in correct position with cyl #1 at TDC. After moving the gear, then reset all tuning specs and adj carb setings and linkage. I'm very happy.