Adjustable vacuum modulator for C-4
The C-4 has an adjustable vacuum modulator. I always have to play with mine a bit to make the the shift points the way I want them. It only affects part throttle shift points, not at WOT that is set by the governor.
Not sure about the FMX, as I have no experience there. Clark might know.
Rev
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'66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi.
O.B.C. #2
'66 coupe
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