i have a 1978 chevy 350 currently in the car as i bought it, and when i wnet to check the timing, the timing tab was located directly in the center of the timing cover behind the water pump. since then i have bought a new balancer, and two new timing covers with the tabs located on the driver's side, just like every other 350. Am i wrong and my motor has the timing tab in the center, or am i doing the impossible and making a motor run with the timing that far off. when ever i time it from the traditional driver side tab, it reads about 60 degrees advanced. any suggestions would be great, simply because it bugs me.