The COBRA lettered valve covers for a 351C were never made commercially. Several folks have "custom fabricated" them, from what I understand. HOWEVER, CS SHELBY lettered valve covers WERE made for the 351C for a very limited time and they are quite hard to come by (I know, it took me over 6 months to find and buy the set I have... and they were NOT CHEAP). Anything that rare is going to cost some $$$s, but worth it if that's what you really want. IMO
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