What is a surefire way to distinguish the difference between a 170ci and the 4-main 200? I can't find any stamps on the engine telling me it's the 170 (T by the road draft mount, there isn't a T anywhere and there are no metal tags). Engine stamp is C4DE-6015-A. Valve cover, head, block and oil pan are all ford blue. Intake manifold has ID# C5DE if that makes any difference. I just want to be 100% positive what engine I'm running in my 62 Comet.
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