74 Camaro Z28

Discussion in '1974 Specific' started by STLCamaro, Sep 12, 2014.

  1. STLCamaro

    STLCamaro New Member

    3
    0
    Sep 3, 2014
    St. Louis, MO
    I am new to the site. I recently purchased a 74 Camaro Z28
    VIN 1Q87T4N109909 the engine had some lower end noise and a misfire. Engines out and at the shop I'm told that its a LT1 engine
    Block VIN V0829CLK serial # 14N109909 Prod date code H203. The person I bought it from has dressed in chrome covers and intake and I would like to "dress" it back original. I'm told that the oil pan is specific to an LT1 and the valve covers and intake as well. Any information would be appreciated.
     
  2. Z28PILOT

    Z28PILOT Veteran Member Lifetime Gold Member

    2,015
    13
    Oct 8, 2009
    Emerald Isle , NC
    Welcome to the NastyZ site
    Go to the NastyZ home page . There you can click on specific year Camaro . There is a ton of basic info there . Options listing, engine codes , transmission info, rear axle ratios etc.

    Also you can click on the 74 Z28 engine link and it describes the parts , their GM part numbers and appearance of the 74 Z28 350 motor .

    Your car came with the aluminum fined GM valve covers , cast iron painted orange intake manifold.
    Your motor is an L82 ...not a LT1 .....the L82 used a four bolt main block and was std in 73 and 74 Z28 models ....installed in Camaros only those two years. It was offered in Vettes too back then.

    But they have many of the same features ...like valve covers ....so go look at the Big Bumper era at the home page. I think the L82 had the same design oil pan with baffles as the LT1. The L82 crankshaft was forged steel same as LT1 . Your car would have had the points distributor , not HEI. It should have a air cleaner with dual short snorkels .

    Please post pics and ask questions at the 74 specific link , tons of people to answer specific questions and threads you can explore to learn all about your car
     
    Last edited: Sep 12, 2014
  3. Gary S

    Gary S Administrator Lifetime Gold Member

    20,631
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    Apr 14, 1999
    Bismarck, North Dakota
    The correct intake should be 340261. It shouldn't be a difficult intake to find as it was used on all Chevy small block engines with 4bbl carb in 1974.
    If the original carb is missing, that will be much harder to find because the Z28 used a different carb than any other 1974 engine. The correct carb is 7044208 A/T or 7044209 M/T.
     
  4. STLCamaro

    STLCamaro New Member

    3
    0
    Sep 3, 2014
    St. Louis, MO
    The engine has a windage tray on is there a specific oil pan that I need or will a regular GM oil pan work?
     
  5. ronzz572

    ronzz572 Veteran Member Lifetime Gold Member

    1,740
    34
    Feb 8, 2007
    imperial pa
    Welcome to nasty z28. Yes you will need the correct oil pan. Why not use the original? You can still buy a replacement from the dealer. Not 100 % correct. But will be fully functional.
     
    Last edited: Sep 12, 2014
  6. david.rosol

    david.rosol Veteran Member

    1,118
    8
    Jul 2, 2009
    Southern Maryland

    So has the original motor been replaced with an LT1??? I think I missed that somewhere. Welcome to the site by the way... post up some pics of what you have, it'll help us answer what questions you have, and give us a better idea what you're referring to... such as if it's an LT1 or not. I don't think you can dress an LT1 up to look like the original L82 engine.
     
  7. CamaroDoc

    CamaroDoc Veteran Member

    1,748
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    Sep 13, 2003
    Skiatook, Okla. 74070
    If I read it right he has the original numbers matching block which is an L82. By '74, the LT1 was no longer available.
     
  8. mgoad1971

    mgoad1971 Veteran Member Lifetime Gold Member

    2,471
    1
    Jul 29, 2011
    Houston, Texas
    Vin decoded:

    VIN Format: 1972-1980 GM

    Decoding: 1Q87T4N109909

    Digit Usage VIN Decoded
    1 Mfgr 1 Chevrolet
    2 Model Q Camaro Sport Coupe
    3-4 Body 87 2 door sport coupe
    5 Engine T V8 350-4v L82 245hp
    6 Year 4 1974
    7 Plant N Norwood OH
    8-13 Sequential Serial # 109909

    Welcome!!!!!!!!!!!
     
  9. Z28PILOT

    Z28PILOT Veteran Member Lifetime Gold Member

    2,015
    13
    Oct 8, 2009
    Emerald Isle , NC
    Sounds like you may have many of the correct parts already , yes the L 82 had a windage tray too. , forged pistons, crank and rods . So that's why machine shop guys think it's a LT1

    Correct carb was a Rochester Quadrajet ....Your motor " CLK " code was a auto matic transmission car. ...you'll want the carb #7044208 ....one year only

    Post pics of what you have, and it will be a lot easier to determine what you have and and what you need or is missing.

    If you want the car to be as correct as possible, You should try and use parts that were from 1973-74 . Latter issued NOS parts might work, but slight differences in appearance and construction occurred randomly as various suppliers were used .
     
  10. 74Z28GC3

    74Z28GC3 Veteran Member

    1,431
    11
    Sep 1, 2000
    North Pole, Alaska
    Welcome to the NastyZ28 board!!!

    Here are some of the correct parts and numbers for a 74 Z28.
    1. HEI distributor - 1112528
    2. Point type distributor - 1112148
    3. Alternator - 1102397 - 37 amp without AC
    4. Alternator - 1100597 - 61 amp with AC
    5. Starter - 1108430 for M38/M40
    6. Starter - 1108418 for M15/M20/M21
    7. EGR Valve - KM 7041413
    8. Thermostat Housing Neck - 336773 (alum.)
    9. Exhaust manifold driver side - 3989041
    10. Exhaust manifold passenger side - 3959562

    Did your 74 Z28 have an HEI distributor or point types distributor on it? If it does have an HEI, do you have the HEI valve cover original brackets/retainers that the spark plug wires attach to? These brackets/retainers are impossible to locate.

    Do you have all of the smog parts?

    Please post some picture of your 74 Z28 for us to see how it looks.

    Take care,
    George
     
    Last edited: Sep 14, 2014

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