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Thread: 73 RS MFI pump 019

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  1. 01-27-2017, 05:24 AM #8
    Rick Cabell
    Rick Cabell is offline
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    Join Date
    Oct 2002
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    Bob, I feel your pump is the real deal. Trying not to turn your for sale thread into a history of the MFI pump.
    Quoting the RS book, MFI pump housing changed alloys in November 27, 1972. That is from mag to aluminum. Gearby was correct that it changed in stages. I am a little confused after looking at my pump. All aluminum but has a date stamp of 35th week of 72. Sometime in August. That is a casting date. Maybe they didn't start using them on the RS until 11/72.
    Those who are interested, I have attached a pic of a all aluminum pump. Gus could clear this up, but don't want to call him over trivia. If nothing else, Bob is getting a free bump on his RS pump.
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