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Thread: how can i tell if it a 429?

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  1. #1
    John Fite is offline Registered User Visit my Photo Gallery
    Join Date
    Jun 2006

    how can i tell if it a 429?


    i found a 71 Ltd but not sure if it a 429?how can i tell

  2. #2
    Dave Severson is offline CHR Member/Contributor Visit my Photo Gallery
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    Jul 2003
    Car Year, Make, Model: '67 Ranchero, '57 Chevy, '82 Camaro,

    get the casting numbers of the block and heads.. Post them here and someone should be able to decipher them for you.
    Yesterday is history, tomorrow is a mystery, Live for Today!
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  3. #3
    Paul Kane's Avatar
    Paul Kane is offline CHR Member Visit my Photo Gallery
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    Sep 2004
    Bay Area
    Car Year, Make, Model: Southwind Jet Boat & Dimarco Hydro



    One way is to flip the motor over and unbutton the pan. One of the crankshaft countrerweights has alphanumeric markings stamped on it's edge, and these markings identify whether it's a 429 or 460 crankshaft.

    429 = 4U, 4UA or 4UAB

    460 = 2Y, 2YA, 2YAB or 2YABC....or 3Y or 3YA.

    Also, for quick identification of the crankshaft, you may look for the nodule or embossment between the first main journal and counterweight. The 460 is embossed there, while the 429 is not:




    429/460 Engine Fanatic

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