I did some work on my engine put in a new oil pump last fall, then winter hit so I didn't drive the car. I was not happy with how it ran but I figured I would get back to it in the spring. It is a 79 T-Bird with a 351M it started hard, backfired and then I got it running. Under a load it misses big time at about 3000 RPM but runs fine otherwise. According to my timing light my timing is advannced 34 degrees. That is a bit much but it is the only way the car runs smooth. What is going on? IS my distributor off a gear perhaps? Did something go bad with my distributor. Any ideas will help.