distributor timing problem? help
i just finished building a 350 engine. The motor sounds great, but when i go down the road it back fires under acceleration(i beleive). I think the distributor might be off a tooth, because when i start the truck it sounds like it's having a hard time starting because it is out of time. I really hope it is not a problem with the valves because the motor has not even been driven more that 2 miles, and sounds great while idiling and even when i goose it a little at stand still, but backfires when driving, and the valves were adjusted the old fashioned way...while the truck was runngin. Any fast help or info would be very much appreciated.