FBO plate over advancing

halifaxhops said
Sounds like you're on the right track. I have said this hundreds of times. DO NOT TRUST A DIAL BACK TIMING LIGHT unless the advance mode is verified. Heck I have seen 0 off also. The potentiometers wear out and gives assuming results. Check it with a timing tape or against a digital light or it will drive you nuts. Also that advance cam will only give you 15 dist degrees maximum The FBO plate can only keep that or go lower something to keep in mind also.
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And I'm looking for around 8* in the distributor. So I'm good there. Timing lights are what they are. Get me close and I can go by feel from there. Find what it likes then weld/file the slots. I don't think I will be able to trust the plate for the long term.