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Pyrotechnic · 03-09-2018, 10:39 AM

Excellent! Not sure what process they used to cut the hole at the factory, but the oval hole at least somewhat explains why there's 4 dimples in the cab instead of just three.

I think I can get away with center punching between the outer holes and then using a 1.75 hole saw.

03-09-2018, 10:39 AM	#15
Pyrotechnic Registered User Join Date: Feb 2007 Location: Austin, TX Posts: 3,930	Re: Installing door wire boot/bellows Excellent! Not sure what process they used to cut the hole at the factory, but the oval hole at least somewhat explains why there's 4 dimples in the cab instead of just three. I think I can get away with center punching between the outer holes and then using a 1.75 hole saw. __________________ 1977 GMC Sierra Grande