Breakforce is what it sounds like, the amount of force your breaks have eg 100%, 75%, 50%... initial break force is where your breaks start at % wise. For drift I'd say set your punch as high as it goes, and your timing as low as it goes. Drag break is the amount of break applied when off the power (throttle in nutral) Punch is how fast it applies power, and timing adds rpm the higher it goes, but that reduces torque. With an 8.5 you don't need any more rpm, so turn it down for more torque.
Hope that helps.
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