Well, no more issues with freeze plugs blowing under the valve cover.
Got half of them done tonight before I had to hit the house and take care of the dogs.
Here's the process of removing the factory freeze plugs and tapping them for 3/4 -14 pipe plugs.
Removing the freeze plugs.....
Checking the bore of for the correct drill and tap sizing. .872 brings it to roughly 7/8", so to fit it with a 3/4 - 14 pipe plug, we need to bore it out a bit.
Once we have that established, time to move to the mill and set up fof the drill and tap.
Start by centering on the original bore with a 7/8 bit. Once it's centered, swap in the 15/16 bit and bore the hole. Once that's done, swap to teh tap center and begin your tap. Stop frequently to check your depth. Once you get the plug roughly flush, you're golden.