A friend of mine has come into a pair of aluminum heads with these numbers on them, no name. Anyone have any idea what they are? For a small block Ford, 2" intake valves, about 1 & 3/4" exhaust valves. Numbers 20450-58-8. I know this is a long shot but thought I'd try to help him find out what he has. Thanks in advance. Jerry
That number is very similar to the old Canfield part numbers where 20450 is the model #, 58 is chamber cc, etc. http://www.canfieldheads.com/sbf_cncc.html