'Performance' Distributor?

FBO Distributor Limiter Plate & Spring Kit

Use the lightest springs in the kit, put the plate on "10" and set the timing with the vacuum advance disconnected and the RPM high enough that the weights are at full advance (with the light springs that is not bad, 2000-2500 RPM) to 30-33 degrees (I use 30 do to the Az heat and 20+ mile hill climbs for detonation, 33 can give a bit more power).