350 numbers

Discussion in 'Small Block Tech' started by 1964401, Feb 13, 2003.

  1. 1964401

    1964401 The Frankenstein Skylark

    Hello all
    Okay so I've been surfing around to all the assorted sites trying to decifer the numbers on the 350 I have that is soon to be rebuilt for the 'lark.....
    Should have asked the board first but didn't want to bother them with what I thought to be a simple thing to find out. Its not!!!
    Numbers as follows
    70Z 113869 - front left of engine block
    SP 255 - left front between front 2 cyl.
    What do I have? How do I decifer these numbers? Help :confused:
    Thanks everyone
    Drew :beer
     
  2. Marco

    Marco Well-Known Member

    the 70Z is probably 40Z

    4 - Buick
    0 - 1970
    Z - assembled at Freemont CA
    113869 - the serial # of the car it came out of (probably 434370Z113869)

    SP - engine code - 315 HP GS350 motor
    255 - engine production code (matches P-O-P for original car)

    HTH
     
  3. 1964401

    1964401 The Frankenstein Skylark

    Thanks Marco!!!!!!
    Drew:beer
     
  4. bignastyGS

    bignastyGS Maggot pilot

    Drew.
    You have one of the best 350 Buick motors that were put in a Buick. 315 hp is the highest hp. Has 10.25:1 compression too.:TU: Will be a great motor top put in your car.I am building one now for my 71 hoping to get mid 13s out of it.
    Pat :TU:
     
  5. 1964401

    1964401 The Frankenstein Skylark

    Thanks Pat
    Guess I did pretty good. A friend of mine who owns a wrecking yard gave me the motor!
    Drew:grin:
     

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