I have for sale a 312 engine that I removed from a vehicle and have had it sitting in my shop for several years. I do not know the history of the engine as it was not running when I purchased it. Doesn't look to bad under the valve covers but I would make the assumption it needs a rebuild. Block is ECZ-6015-C, the crank has the proper single dot on flywheel flange. The heads are 5750-471 which identifies them as the big valve intakes and low compression. The cylinders measure 3.830 so it has been bored .030. Engine has a two barrel manifold on it now but I will throw in a four barrel intake. (Holley bolt pattern) If the 471 heads are not what you are looking for then I can  switch them out for 113's or G heads. I am located in Leavenworth, Washington. Asking 700.00 OBO Thanks, Dave 509 548 6382