There might be a way to set your timing useing a vacumn gauge. Years ago if we did not have a timing light we would hook up a vacumn gauge and by adjusting the idle speed and turning the distributor to get the highest reading on the gauge we would then back off the timing untill the reading dropped one inch. We would road test by going up a hill, a very slight ping was acceptable. In the computer controlled cars you dont have to mess with the idle speed just the timing. Mike