Every distributor is different. Depends on counterweight weight, condition, bushing condition, gear condition (play and free movement)
The spring selection will be trial and error based on the above factors. My distributor in my 69 convertable will react differently (maybe minute, maybe extreme) if placed in your car. Just depends on overall condition of the parts in question.
Set your initial, then advance until 32-36 degrees total is achieved by 2500 rpm. You will have to change springs a few times to get her close. If your initial is 12, you need roughly 22-24 advance all in by 2500 for a total of 34-36 degrees.
Si Vis Pacem Parabellum
1967 Starlight black PMD Engineering 400 Auto 1968 Alpine Blue 400 4 speed 1968 Verdoro Green 400 HO 4 speed 2013 1LE 2SS/RS Inferno Orange Camaro.
