Reply To: 1957 Mercury Mark 75…..To bore, or not to bore?

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April 23, 2026 at 7:02 am #316221
Cjbrill715
Participant
    Dale wrote:

    CJ, if you buy new rings make sure you check the end gap.  I bought a set for my Mark55 and there was almost no end gap.

    dale

    Get’em wet….don’t let’em set!!

    If I’m not mistaken, i believe the MK55 runs the same pistons and rings as the MK75….I’m looking at a set of rings from Mopar Mall.