IDK about the high idle-65 tow deal, but yes I believe the park brake is set to let the high idle work.
I believe the 100perf & 120race are pretty much the same with stock oil & inj. but someone will come along that knows alot more than me.
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2000 F-250 SCLB 2wd 7.3 auto PHP stock-65t-80dd-120race-high idle-no start 4"tb exh, wicked wheel, 3 guages, AIS, coolant filt,
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