on my 1985 300D two of the three bolts on my thermostat housing came out with no problems. But the one on the left side was sticking and became sort of rounded off. Now a conventional wrench will get it but my ratchet wont. Seeing as there is not enough room to maneveur the conventional wrench with out taking off that line above it, what are my options? Bolt extractors? take off the line above it? (its the metal line) all options welcomed! Thanks.