Unless you are doing MASSIVE changes to your wiring circuits use a repo. I use a Painless Harness in my 69 SS but I have a ton of electrical modifications from MSD engine electronics to power seats, 3rd brake light 1300 Watt stereo system, one wire amp, Vintage Aire A/C, manual control of lockup on a 2004R, electric trunk lock release, line lock on the front brakes, voltmeter, 250 GPH fuel pump system, additional interior lights, etc.
Redrum (or Mike)
68 Corvette - 383 CI, 427 HP, 700R4, 12.56 @ 108 MPH
69 SS Chevelle - 502 CI, 610 HP, 2004R, 1320 unknown
97 Z-28 - totally stock still under 14,000 miles
Put decaf in the coffee maker for 3 weeks. Once
everyone has gotten over their caffeine addictions,
switch to espresso.
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