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Sealing the hole in the firewall?


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This is in regards to a 78 model and I am referring to the hole that is under the washer tank and clutch master cylinder. I have a car that someone else installed a megasquirt but they just ran the wires, O2 sensor cable and MAP line through that hole without any effort whatsoever to seal it. MSA sells a reproduction grommet but of course I would have to disconnect all the wires and re-run them through the hole. I live in an apartment complex so I don't like to work on anything that is too involved so would rather not do that at this time. So I'm just wondering what people on here have done to address this?



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