Coolant in Oil

Hey Guys. I backed in a 1947 WC, into the garage yesterday. I pulled the plug on the pan tonight, and the first thing to come out was COOLANT!! Now, running the tractor when I brought it home and when I backed it into the garage, I noticed coolant leaking out the head gasket on the right side. The only thing I can think of, is a bad head gasket, the O-rings on the sleeves are bad, or my worst fear...there might be a internal crack in the block. I'm gonna pull the pan tommorow to see what I can find out. My question is, could there be anything else that would cause this? and If so, what wouldit be? I know this is common for the old motors, but has anyone on here ever had this happen? and if so, how hard of a fix was it?

I don't know if there is a frost plug in the head of the 201 motors or not, but if you have coolant coming out the right side of the head gasket, a blown head gasket will more than likely have to be the source, because the push rod cavities are on the right side of the block as well.  Since the coolant leak has to navigate it's way from the point of the leak past the rather large openings in the block for the push rods, more than likely it is also going into the pushrod galleys as well.  But those are the only three points for collant to get into the oil, the head gasket, the liner o-rings, and if so equiped the head frost plug, since you have coolant at the head gasket on the outside, that is where I would start, put a new head gasket on it.

For sure check the core plugs in the top of the head before pulling the pan. It might save you a whole bunch of work. If one of the plugs rusts through, coolant can leak out and drain down in the pan. Even if they don't look bad, I would replace them if there is any question about them leaking. Clean the casting cored hole out good(I used a wire wheel on a die grinder) and replace the plugs with new ones available at any auto parts store for a couple bucks. I smeared a very thin layer of RTV on both surfaces. Don't know what other people do but it has worked good so far.
 A 2 dollar solution may fix you up for a few more years.  Charlie

If the coolant level is up to cover the fins in the rad, it would be at least a couple inches above the core plugs. Probably no need to pressurize the system if the plugs are rusted out. If the core plugs are leaking, I wouldn't "open things up" till I replaced them.
 It is possible to check the coolant system with a small amount of pressure without opening things up. If the system holds pressure, there are no leaks. If it doesn't hold pressure, you would probably need to check into the whole system. Possibly head gasket, cracked head, o-rings or a cracked block.