"Correct" cast iron manifold for Buick 300 (65/66/67). Media blasted inside and out, then primed and painted with CARS Buick green engine paint. Don't worry about photo colors, just bad photography. No cracks, no problems, and comes with the thermostat housing, although slightly pitted, it's still in good shape. Price is $350.00 USD and includes delivery in the continental U.S. Your check is good, or a money order. Also I can have my machine shop do the "Doc" modification using a Bridgeport milling machine if you want. I'll have to see how much "grease" I have to apply to the machinist to get it done though.
