Just to update this a bit. A little over a week ago I replaced the intake gaskets. Didn't visually see anything wrong with the old ones, but there are new ones in place.
It hasn't done the running on 7 cylinders thing since. It hasn't been as cold out either, but still hasn't done it. I'm still keeping an eye on it that first minute it runs when it starts up.
If anything changes, I'll chime back in. Thanks again for every ones help!
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