Reply To: ID engine by number on freeze plug?? Johnson 1400229

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November 5, 2020 at 9:10 am #220162
Mumbles
Participant

    Since the factory installed ID plates don’t fall off by themselves and one was never reinstalled, there’s a good chance your ’55 RD had a shady past and a welch plug from a ’56 model was installed to help conceal that past. Just saying.

    Serials-55-56.