New spark plugs are in. New spark plug wires are in. Engine runs beautifully now, a really amazing difference.
I have a minor oil leak from the valve cover gasket on one side. I don't think it's even worth fixing yet, though I'll keep an eye on it in case it gets worse.
The spark plugs were definitely worn. The preferred gap is .054, and the worst of the bunch was almost at .070 which would definitely be causing misfires. Nothing on the plugs to indicate other than normal wear.
What I thought was a leak in my upper radiator hose wasn't. Still don't know where the leak is, but it's really slow.