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NOTE:  I use a 6 pole switch when ever possible.   More options, you can use a 2 position dimmer switch, and they're all the same switching pattern!   About the only problem you'll run into is the GEN/OIL light shield underneath the dash on early 2 and 3 light dashes.   This will have to be trimmed so as not short out on the contacts, not a big deal....     
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