The regulator, that is the slotted steel part that limits the travel of the weights may also have a number stamped into it. That marking will identify the distributor degree advance potential of the centrifical advance mechanism.
You may also notice different spring lengths and wire thickness. Those control the shape of the centrifical advance curve.
As a general rule, lighter vehicles can take more advance early, for improved performance and acceleration snap. Heavy vehicles will use a less aggressive advance curve to advoid pinging. Do some internet searching on ‘distributor curves’ and then maybe build up a couple of distributors, with different curves and vacuum setting and see what works well for you.
