Dizzy curve
First measure what's there from the lowest rpm. (Vacuum hose plugged)
This is the 225 timing specs from the '67 Plym Manual when initial is set to 5*.
'65 might be a little different but this one will get you in the ballpark to start.
A super quick 'all in' is fine with drag race only, no vacuum advance, points ignition. Other than that, take a cue from the factory. The engineeers and techs didn't just pull these advances out of thin air.
Plot where the timing is with your distributor.
First measure what's there from the lowest rpm. (Vacuum hose plugged)
This is the 225 timing specs from the '67 Plym Manual when initial is set to 5*.
'65 might be a little different but this one will get you in the ballpark to start.
A super quick 'all in' is fine with drag race only, no vacuum advance, points ignition. Other than that, take a cue from the factory. The engineeers and techs didn't just pull these advances out of thin air.
Plot where the timing is with your distributor.