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#2
10-02-2018, 08:26 PM
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I may be wrong, but the L89 head is closed chamber and the '69 L88 head is open chamber. There is a huge difference in the shape of the chamber. Also, I believe the L89 head has square exhaust ports and the '69 L88 head has round exhaust ports.
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Freddie 1969 Camaro RS/SS396 (427) 4 speed 
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