Camshaft timing and ignition timing are two different, but equally important procedures when you're looking for a few extra horsepower, or extra torque at a particular RPM range. 34 degrees of initial, plus centrifugal timing is about right, although some of the round track engines I've built liked up to 36 or even 37 degrees. Staying a bit below that range is prudent, because one degree too much ignition timing robs as much power as 5 degrees retarded from the maximum power number. Vacuum advance can add as much as 10 extra degrees of advance for improved gas mileage, but only under light throttle cruise conditions.
Cam timing can be advanced or retarded a few degrees with offset woodruff keys at the cam or crankshaft gears, or extra keyways in the gears or sprockets. Advancing the cam from its "straight up" position adds low end torque- - - - -retarding the cam adds top end horsepower. Computer controlled timing cam do both with the same cam, but that adds a whole extra layer of complexity to the equation.
Jerry
