Stahl issues: Carb or Timing?

15 initial 36 total Max 38 any more then that you causing damage. Do you know that before top dead center is the plug firing before the piston reaches the top on firing stroke. If you install a bigger cam do not use the vacuum advance. Here is the cheap way to get it close enough for a driver. Take the distributor apart .Weld the advance slots shut toward the insde or the shaft this to achieve proper rpm total. They are .470 factory close them up and file them open to .370 Take out the big spring on one weight and leave the small one on the other . this is the same as two Mopar Light springs. Now when your initial is at 15 your total should be 35. This gives you 20 retard for start up from 35 total. A motor will run is best a 35 -38 at all times. It just needs the 20 retard to start. MSD digital 6 has this built in so you can lock your distributor at 35-38. Before these new digital ign. You would have your coil hooked to a toggle and turn it on after the starter was ingaged. This would allow the motor to start spinning to eliminate cyl. kick back. The 69 that just left here just had it done the car was like night and day. If you are running a factory cam and all pretaining factory parts and you want economy leave the advance in place. This is for cars with engine mods done. But rember a 4bbl is a 8.5 advance and a 2bbl is an 11.0 its stamped in the arm.