I have the harnesses from 2 rally gauge set ups already. When I read the wiring diagram for a full size Pontiac it seems that the wire colors are the same for both rally and non-rally gauge cars so I was wondering:
1. are the plugs the same?
2. do I just have to modify the plugs?
It seems that on both versions of the car there is the similar/same set-up:
Water Temp: has two wires going to plug (Pink and Green ... Pink coming from Ignition Switch and Green coming from the firewall ... these green and pink wires are just plain stators at the end which form the 2 stator plug into the Temp Gauge.
Oil Pressure: Has two wires going to plug (Pink and Blue ... Pink coming from Ignition Switch and Blue coming from the firewall ... they form a 2 stator plug into the Oil Pressure Gauge.
So I'm going to look at my non-Rally speedo that I have (extra parts) and see what those receptacles look like into the Warning Lights. If it's different I'm thinking all I need to do is switch out the harness from the non-rally version to the rally version since it'll still need to be plugged into the same plug on the firewall and will still need to be connected to the ignition switch?
 I may be wrong ... but the search/hunt is fun!
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1970 GTO Convertible 455 Ram Air M-21, Atoll/Blue/Black, Hood Tach, 3:31 12-Bolt Posi, A/C, Console
1966 Grand Prix 421 Tripower 4spd, Marina Turquoise/Turquoise, a/c, console, posi, reverb. pa, pb, ps, remote mirror, mats
2010 Dodge Challenger R/T Classic, 6spd Hemi, Detonator Yellow, black stripe, black leather
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