Re: Head number
I think what may have sparked the O/P's original question is the fact that most contemporary cars use head bolts/studs that are designed to be used one time only, as they were designed to stretch a certain amount on installation. (I know I had a shock when I saw a line item for a couple of hundred bucks for "Head Bolts" on the bill when I had the head gasket replaced on my '82 Dodge Rampage.)
Please be assured that this is not the case with the old Fords.
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