1970 Camaro SS

Discussion in '1970 - 1973 Specific' started by ssmro, Feb 5, 2018.

  1. ssmro

    ssmro New Member

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    Apr 30, 2010
    norfolk ne
    I have a 1970 Camaro SS 350. It has 041 X heads. Were these the standard heads used on a 350? I was told they were normally used on Corvettes.
     
  2. Gary S

    Gary S Administrator Lifetime Gold Member

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    Apr 14, 1999
    Bismarck, North Dakota
    In 1970, the 041 head and the 186 head were used interchaneably for all the higher performance 350 engines, (300hp, 360hp, 370hp). The two castings are basically the same. You can find both of them on Full Size cars, Chevelles, Nova, Camaro, and Corvette depending on which one was available when needed for assembly.
     
  3. ssmro

    ssmro New Member

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    Apr 30, 2010
    norfolk ne
    Thanks for the info. They are the 041X heads with 2.02 valves. I just thought they may have been used on the higher horsepower engines than the L48.
    I had wanted to find out more about the the car but I know the build sheets aren't available for this year Camaro. I just wondered if it was a special order motor. It has about 350,000 miles on it and still runs about 165 pounds on the compression tester and no wear on the cylinders.
     
  4. Gary S

    Gary S Administrator Lifetime Gold Member

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    Apr 14, 1999
    Bismarck, North Dakota
    The 2.02 valves were used only on the Corvette LT1 and L46, and the Camaro Z28 with LT1 engine. The L48 originally came with 1.94 valves. No special orders were available so you can be pretty sure those valves are not original to the car.
     
  5. ssmro

    ssmro New Member

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    Apr 30, 2010
    norfolk ne
    it had a burned valve about 20 years ago so all the valves were replaced. I would have thought the same valves would have been used, but maybe they had put in the larger ones. I had hardened seats and valves put in.
     
  6. ssmro

    ssmro New Member

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    Apr 30, 2010
    norfolk ne
    Would the L48 have come with the X heads though. I am almost positive the heads are original. I am the second owner and have had it for about 45 years.
     
  7. Gary S

    Gary S Administrator Lifetime Gold Member

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    Apr 14, 1999
    Bismarck, North Dakota
    There was only one 3947041 head for 1969 and 1970. If there is an X on the casting, it has no meaning on this head.
    Late 1972 had a head with the X added to the casting, but again, it meant nothing. The head with the X was the same as the ones without the X if the casting number was the same.
     

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