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Old57 · 05-10-2018, 11:09 PM

Yes, I've heard of people doing that, but I've always heard to drill two 1/8" holes across from each other. They say it allows the air to escape when filling the cooling system too.

05-10-2018, 11:09 PM	#167
Old57 Registered User Join Date: Apr 2015 Location: Wichita Kansas Posts: 455	Re: 57 GMC, frame swap, 4wd, 454 big block, 4 speed Yes, I've heard of people doing that, but I've always heard to drill two 1/8" holes across from each other. They say it allows the air to escape when filling the cooling system too. __________________ My 57 GMC build