[TINNMANN]

Depending on your cam you may have to start with more advance IE. I have a fairly large cam ( 610 lift) and my base is set at 18 deg. total 34 all in at 3000 rpm vac disconnected. By doing that the motor is able to burn off the fuel rather than dumping it into the exhaust which can cause backfires or pops. The thing to watch for is too much advance because you won't be able to hear if the motor is knocking. You may have to recurve the dizzy to get the desired amount of advance in by about 3000 rpm just be sure that you disconnect and plug the vac advance and plug it before setting it up. If you have to buy a timing light spend the extra to get the dial back digital with tach it will make life much simpler. If you are running a vac advance I chose to use the timed port so at a idle there is no advance to the timing because as you add more base timing you could get to a point that kickback could happen.
Cheers Greg