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Re: Chevy smallblock smog heads?
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Posted by JDJIM on February 13, 2002 at 17:26:07 from (67.36.100.108):
In Reply to: Chevy smallblock smog heads? posted by Mike Christian on February 13, 2002 at 11:49:01:
Mike Somewhere in the top of the head there is a casting number , should be six or seven digits long ie. 3973487 , that is a good casting , the old heavy head from the early '70s , later heads were cast lighter and had more restrictive ports . Look for the #### and put them on here , I'll give you some info on them , I have several books to look them up in . JIM
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