'Performance' Distributor?

Jim Kueneman said
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).

I used the plate on mine for a short period of time. I got about 16 out of the 10 slots on the plate, because it's not made for the slant 6, although it does fit. I ended up removing the plate, welding the governor slots and filing them to the proper 10 crank degrees. Now I have about 21 initial and 31 total. Just right.