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Technical Mallory Distributor Numbers and Suffixes

Discussion in 'The Hokey Ass Message Board' started by RainierHooker, Jun 29, 2018.

  1. RainierHooker
    Joined: Dec 20, 2011
    Posts: 1,984

    RainierHooker
    Member
    from Tacoma, WA

    I just got an old Mallory Double-Life Dual Point for my early SBC that I'm building. It is a YC-310-F. I know that the YC denotes a Dual Point with this specific body, and I know that the 310 denotes Chevrolet V8, but what about the F?

    I've read, mostly around these parts, that the suffix has to do with the mechanical advance curve but I haven't been able to find a reference for what those differences would be. The most common ones seem to be HP, F, and G but I'm sure that there are more out there. One blurb in an ad said that G was for corvette applications, but I feel that that is just seller's hype.

    I'm hoping a got a good one for a street application, but even if I didn't, the flat cap on this one should be worth more than what I paid for the whole thing...

    *** List of Mallory Distributor Applications to be added below ***

    Distributor Prefixes:

    Y - Centrifugal (mechanical) Advance
    Z - Centrifugal and Vacuum Advance
    C - Circuit Breaker (points) type distributors
    M - Magnetic Trigger type distributors
    G - Governor Attachment

    Number & Suffix - Year - Application - Make - Cylinders & Rotation

    011 - 1928-32 - Model A and Model B - Ford - 4 LH
    012 - 1928-32 - All - Packard & Graham-Paige - 6 RH
    013BZ - 1940-48 - All - Cadillac - 8 RH
    013CD - Unknown - Continental B-6427 - Continental - 6 LH
    013CJ - Unknown - 377, 477, 501 - AutoCar - 6 RH
    013CL - Unknown - B6, EN, 310, BQ, CE, CF, CT, BG, CU, EN415, 468, 425 - Mack - 6 RH
    013CM - Unknown - EN354 - Mack - 6 RH
    013CN - Unknown - BG, EN-310 - Mack - 6 RH
    013CP - Unknown - B6, CO, EN310, EN354 - Mack - 6 LH
    013CR - Unknown - Marine - Unknown - 6 LH
    013CW - Unknown - Magnetti Marelli - Fiat - 4 RH
    013W - Unknown - 11A, 13A, 16A, 20A, 21H - White - 6 RH
    014 - Unknown - Truck - Mack - 4 RH
    015 - 1928-on - Unknown - Dodge - 4 RH
    016 - 1927-on - Model 31 - Chandler 6 RH
    017 - 1926-on - T-6 - Red - 6 RH
    018 - Unknown - Truck - International Harvester - 4 RH
    019 - Unknown - Bus - Wills - 6 RH
    020 - Unknown - Truck - Mack - 6 LH
    021 - 1928-on - Model B - Divco - 4 RH
    022 - Unknown
    023 - 1928-32 - All - Oldsmobile - 6 RH
    024 - 1927-30 - Senior - Dodge - 6 RH
    025 - 1929-36 - Unknown - Studebaker/Jordan/Pierce-Arrow - 8 RH
    026 - 1929-33 - Model K - Desoto/Chrysler - 6 RH
    027 - 1928-29 - Unknown - Hudson - 6 RH
    028 - 1926-on - Model A - Jordan - 8 RH
    029 - 1928-30 - Model 70 - Durant - 6 RH
    030 - 1928-29 - Unknown - Wolverine - 6 LH
    031 - 1929-30 - Unknown - Desoto/Chrysler - 6 RH
    032 - 1930-on - 353 - Cadillac - 8 RH

    ***skipping ahead***

    292A - 1953-64 - 322ci, 361-425ci - Buick - 8 RH
    292B - 1953-64 - 322ci, 361-425ci - Buick - 8 RH
    292C - 1953-64 - 322ci, 361-425ci - Buick - 8 RH
    292D - 1953-64 - 322ci, 361-425ci - Buick - 8 RH
    292E - 1953-64 - 322ci, 361-425ci - Buick - 8 RH
    292F - 1953-64 - 322ci, 361-425ci - Buick - 8 RH
    292G - 1953-64 - 322ci, 361-425ci - Buick - 8 RH
    293A - 1952-74 - Type 1, 356B, 356C, 912, 1600S (all Air-Cooled) - VW/Porsche - 4 RH
    293B - 1952-74 - Type 1, 356B, 356C, 912, 1600S (all Air-Cooled) - VW/Porsche - 4 RH
    293C - 1952-74 - Type 1, 356B, 356C, 912, 1600S (all Air-Cooled) - VW/Porsche - 4 RH
    293D - 1952-74 - Type 1, 356B, 356C, 912, 1600S (all Air-Cooled) - VW/Porsche - 4 RH
    294A - 1953-60 - V8 - Studebaker/Packard - 8 LH
    294B - 1953-60 - V8 - Studebaker/Packard - 8 LH
    295A - 1953-56 - Jet, Super Jet, Jet Liner, Wasp - Hudson - 6 RH
    295B - 1953-56 - Jet, Super Jet, Jet Liner, Wasp - Hudson - 6 RH
    296A - Unknown - 100 - Austin-Healey - 4 LH
    296B - Unknown - 100 - Austin-Healey - 4 LH
    297 - 1954-58 - 360ci, 370ci, 426ci, 503ci - GMC - 6 RH
    298 - Unknown - Marine - Gray - 4 RH
    299 - Unknown - Marine - Gray - 4 RH
    300A - 1954 - 239ci with hex-drive - Ford - 8 LH
    300B - 1954 - 239ci with hex-drive - Ford - 8 LH
    301 - 1954 - 250ci, 256ci - Mercury/Ford - 8 LH
    302 - 1954 - All - Lincoln - 8 LH
    303A - 1954-60 - All - Cadillac - 8 LH
    303B - 1954-60 - All - Cadillac - 8 LH
    303C - 1954-60 - All - Cadillac - 8 LH
    303D - 1954-60 - All - Cadillac - 8 LH
    303E - 1954-60 - All - Cadillac - 8 LH
    304 - Unknown - Unknown - Unknown - 1 LH
    305 - Unknown - Unknown - Waukesha - 4 LH
    306 - Unknown - English Zephyr - Ford - 6 LH
    307 - Unknown - Unknown - Waukesha - 4 LH
    308 - Unknown - Marine - Scripps - 6 RH
    309 - 1954 - Marine - Gray - 6 RH
    310A - 1955-96 - Std Chev. V8 265-502ci (see also 482) - Chevrolet - 8 RH
    310B - 1955-96 - Std Chev. V8 265-502ci (see also 482) - Chevrolet - 8 RH
    310C - 1955-96 - Std Chev. V8 265-502ci (see also 482) - Chevrolet - 8 RH
    310D - 1955-96 - Std Chev. V8 265-502ci (see also 482) - Chevrolet - 8 RH
    310E - 1955-96 - Std Chev. V8 265-502ci (see also 482) - Chevrolet - 8 RH
    311A - 1955-56 - 256ci, 272ci, 292ci V8 - Ford - 8 LH
    311B - 1955-56 - 256ci, 272ci, 292ci V8 - Ford - 8 LH
    311C - 1955-56 - 256ci, 272ci, 292ci V8 - Ford - 8 LH
    311D - 1955-56 - 256ci, 272ci, 292ci V8 - Ford - 8 LH

    To Be Continued...
     
    Last edited: Jun 29, 2018
  2. Chappy444
    Joined: Jan 27, 2012
    Posts: 340

    Chappy444
    ALLIANCE MEMBER
    1. Maryland HAMBers

  3. RainierHooker
    Joined: Dec 20, 2011
    Posts: 1,984

    RainierHooker
    Member
    from Tacoma, WA

    I figure this might be as good a place as any to make a "master" list of Mallory numbers and prefixes. I've updated the thread title and as we dig up numbers and codes I'll update the original post so guys can figure out what Mallory they just bought at the local swap...
     
  4. rjones35
    Joined: May 12, 2008
    Posts: 753

    rjones35
    Member

    Seems like there is a list floating around on here somewhere. Might be a link to a list, but I'm pretty sure I've seen one.
     
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  5. 24riverview
    Joined: Jan 13, 2008
    Posts: 700

    24riverview
    Member

    This might be helpful also, from 1976 catalog.
    Old# to New#.jpg
     
  6. RainierHooker
    Joined: Dec 20, 2011
    Posts: 1,984

    RainierHooker
    Member
    from Tacoma, WA

    I found that list from a previous thread. It shows the cross reference for the old numbers to their new numbers. It shows that the suffix denotes advance curves, but isn't specific as to what those different curves are...
     
  7. RainierHooker
    Joined: Dec 20, 2011
    Posts: 1,984

    RainierHooker
    Member
    from Tacoma, WA

  8. Fordors
    Joined: Sep 22, 2016
    Posts: 1,013

    Fordors
    Member

    Yes, as you said YC denotes a Mallory being dual point but so does ZC. The YC Mallory’s are centrifugal advance only, while a ZC has both centrifugal and vacuum advance. I have never found any info that explains the suffix letters.
     
  9. Moriarity
    Joined: Apr 11, 2001
    Posts: 12,414

    Moriarity
    SUPER MODERATOR
    Staff Member

  10. This is true according to this..
    Mallory.JPG
     
  11. RainierHooker
    Joined: Dec 20, 2011
    Posts: 1,984

    RainierHooker
    Member
    from Tacoma, WA

    It does, and thats where I'm pulling this info from. However, that list has many holes in it, it doesn't even show the 310F that I have, and is not searchable in the way that a typed-in post would be. While I'm being selfish asking for information, I may as well do something for the good of the HAMB and the web while I'm at it...
     
  12. RainierHooker
    Joined: Dec 20, 2011
    Posts: 1,984

    RainierHooker
    Member
    from Tacoma, WA

    Cool, that's the kinda stuff I want to condense into the original post.
     
  13. Moriarity
    Joined: Apr 11, 2001
    Posts: 12,414

    Moriarity
    SUPER MODERATOR
    Staff Member


    It does show the 310, the suffix letters are merely different advance curves
     
  14. Moriarity
    Joined: Apr 11, 2001
    Posts: 12,414

    Moriarity
    SUPER MODERATOR
    Staff Member

  15. RainierHooker
    Joined: Dec 20, 2011
    Posts: 1,984

    RainierHooker
    Member
    from Tacoma, WA

    Hmmm @Moriarity . This chart only shows the 310 with the A-E suffixes:

    [​IMG]

    ...thats where my question stemmed from. The 310F isn't reflected there. In the chart you showed (presumably from 1959?), it only shows the 310F and none of the other ones. In other types the suffixes appear to change with different years, ie the 1952 Caddy is a ZC 283A while the '53 is a ZC 283B. I'll buy that they are a different curve, but there seems no rhyme or reason to the curves being different on the same car of a different year.

    If anything though, your chart lays to rest my original concern, of whether a YC-310F would work in a mostly stock 1958 283 with a 097 cam. Its right there on your chart as the only option.
     
    Moriarity likes this.
  16. Fordors
    Joined: Sep 22, 2016
    Posts: 1,013

    Fordors
    Member

    kadillackid posted a page from Mallory Form 347 and it mentions distributors stamped with an M, if you run across one of those check to see if there is a jumper connecting the two sets of points. A virgin "M" dist. will not have a jumper, those points are wired separately to a Magspark Transformer. The side of the Magspark with a tag stamped with a P connects to the condenser on the distributor and that condenser should already be connected to the P terminal. The other side of the Magspark will have an R terminal and that obviously goes to the other set of points connected to the R terminal of the distributor body.
    If an M stamped distributor has been changed by someone and does have a jumper wire connecting the two sets of points then it can be used and wired as with a conventional coil.
     

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