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Replacement Valve Covers

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    My research says that all panthers came with Romeo engines; W is the 8th character in the VIN.

    Originally posted by gadget73 View Post
    GM did similar goofy things on the 4.3 V6, you had a Romulus engine or a Tonawanda engine. The cam bearings are different for some reason. Just seems dumb to me to have a nearly-identical engine made in 2 places that are not actually identical.
    For sure. There was also a balance shaft version of the 4.3 (maybe it was the vortec); I remember running into that years ago doing an S10 engine swap.
    **2012 Ford Mustang Boss 302: 5.0/ 6 spd/ 3.73s, 20K Cruiser
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      ^^^^^^^^8th digit on mine is a W. I will count the valve cover bolts to confirm though.^^^^^^^^^^


        Yes, the vortec 4.3 had a balance shaft (which you can remove if you where so inclined). The new 4.3 is a vvt, theres no mention of a balance shaft in them.