the fairlane and LTD clusters are different, i'm not sure how the lighting differs in those.
there is a doco on
www.fordmods.com that might give you a little more info.
in terms of keeping the needles white, not really as it all uses the same light sources.
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FALCN6 - Turbo, Air Bag Suspension - Hibernating
EL GT - Supercharged
NASCAR - 83 Thunderbird , Bagged
DAILY - BA Fairlane Ghia, Boss 260 Turbo
OFFROADER - Ford Explorer
