does a 90 dash setup need a 90 dash harness?
 

im putting a black 90 interior in my car and i do have a 90 harness also..do i need to swap that also?

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1987 black notch(ex 4 banger)
DSS 306 w/ main support...Elderbrock 6028 heads..gt-40 intake..24# injectors...70 mm tb..77 pro-m...accel 300+..mac full legnth..tremec w/ pro5oh...full MAC exhaust,off road h-pipe,long tubes, catback...ron davis radiator..subframes, control arms...CFDF II..o yea holley FPR sucks..dont buy one..
AIM=onesillynotch
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If you are just installing the dash - then you probably won't need the wiring harness. It is attached to the car itself, not the dash, and the controls in the dash just attach to the harness connectors. If you have the 90 instrument cluster, for it to work you have to reroute some of the wires. see this tech on Stangnet http://www.stangnet.com/tech/cluster87-93.pdf
Good luck


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Basically stock 87 LX 5.0, owned since 3/31/1987. 216,000+ mile daily driver, GT interior, King Cobra clutch, World Class T-5, GT turbine wheels.
Plans: GT hatch & spoiler, rear disk brakes, and a PAINT JOB!