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I have a 70 six pack engine in the shop, it has the c your talking of and its an original 6 pack engine. also has HP 2. The C is a designation for special crank and rods. As far as ALL 70 engines having the special parts, its BS. I've owned 3 that were stock engines that all had std rods, pistons and crank. As far as secret goes, are we not here to help each other?



dave its not all 70 440's , only 6pk and HP , the 4bbl c barge motors had LY rods and internal balance dampners , only the 6pk engine has a piston with valve reliefs , the 440 HP does not