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Originally posted by rayy:
Ok got the casting #E3Zm 6049 C3.
It is likely given the era these are the last in the series of FMS heads that used standard C valve train and were the later iterations of C302s. There were actually heads that each carried C302, C302B and several iterations that carried the C3 designation in the series of heads that used standard 335 Series (Cleveland) valve train. There was also a more contemporary head that carried this number that was significantly different. All had subtle variations to one another but in general they were the smallest port volume configuration of the high port heads offered at the time. The C series were advertised as having 212cc intake runner volume, 95cc exhaust, and 62cc combustions chambers and were optimized for smaller displacement engines. Most of these heads have been through so many hands by now few bare any resemblance to these specs.
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It is not a Motorsport block and for sure is a Windsor.
Not sure if you are generalizing, but all the FMS blocks were more Windsor than anything else as far as features excepting main bearing diameter and possibly deck height (9.2 version). Do you know the deck height? Be advised that FMS blocks of the era were not always clearly marked. There should be a part number down by the motor mount. Is there a part number on the intake manifold (maybe M-9424-xxxx)? A picture of the intake manifold flange thickness can sometimes signal deck height; thicker suggests 9.5. If there was a good picture of the front of the engine that could also help. If it is a 9.2 deck engine, odds are very high it is an FMS block.
If you don’t know what you have you'd be better parting that out if you want to maximize your take. Unless you just want to unload it, you're not likely to command premium let alone market for a collection of unknown parts on a used engine.
My 2 Cents.
Best,
K
