Cooking on low in a crock pot with true ethelene glycol works wonders but if its just looks you are after just leave it be unless you have a compelling reason to take apart the engine its best to follow the "if its not broke don't fix it" theory.

You have to remove the carb, and any paper gaskets or o-rings to do it correctly.

Also stay away from the fumes and don't eat out of the crock ever again, I bought a 5 dollar yard sale special just for this.