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Old 09-12-2018, 11:29 AM   #30
Caustik
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Join Date: Apr 2017
Location: Elizabeth
Posts: 40
Re: In the Red 69 GMC

Quote:
Originally Posted by 1971Stepside View Post
How big was the hole you had to cut in the firewall to get your wires through for the PCM? I'm trying to decide the best location for mine. I would like to have it on the radiator support, but not sure how to get the wires that far.
It was about 3" if you bundled the wires better than I did I think 2.5" would work.
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