Crab distrubtor ignition advance

[Rudolph]

Hello, I set up a crab distrubtor on the Wasco coming fixture and set the initial advance like the instructions say but when its on the car it seems to like that sliding scale set to max and then I think slotting the slot more would help, I cant get the engine to ping even under max load, I am using 91 octane fuel, I want to keep advancing it to I hear the tinkel tinkel sound and then back it off a bit, I reckon the engine would go really well then

Do other people slot the distrubtor body? I think someone sed do it with the pertronix?