Big-Block Mounts

Discussion in '1970 - 1973 Specific' started by 79konz350, Dec 11, 2017.

  1. 79konz350

    79konz350 New Member

    Nov 26, 2016
    I'm helping a buddy put a 454 in his 77 formula firebird, and I know this is a camaro forum, but I figured I's ask here because the 70-73's got big blocks if I'm not mistaken. Im assuming there were no significant changes to the firebird/camaro subframe that would cause issues, so what motor mounts should we use? He had an olds 403 in the car.
  2. BigBlock73

    BigBlock73 Veteran Member Lifetime Gold Member

    Jul 10, 2002
    Accord,New York
    BBC were 70-72
    72 used the same mounts as the small block
    So 72-81 SBC mounts will work
  3. john Gialanella

    john Gialanella Veteran Member

    Oct 15, 2008
    Bloomfield N.J.
    Make sure that your headers have clearence, if you are using the 1973-81 Clam shell mounts. Otherwise you can use the 1970-71 setup which has all steel frame mounts for frame(bottom) and Hard rubber/steel motor mounts for engine. If you use the second one I have real nice 1970-71 frame mounts with GM part numbers on them. $50.00 for them

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