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That is a serious mismatch. By Royce P - 10/14/2005 7:51:35 AM; IP 207.69.139.7 Those heads have different size combustion chambers and different port sizes. Neither is a high performance head. Both are common variants. You should try to find one of either type to make a pair. Don't try using them together, the engine will not run right. It will have a fundamental out of balance in compression that will be very annoying. Royce

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Skip Navigation Links.  I have the opportunity to buy a 390 engine -- Justin G, 10/10/2005  C7AE-A and C6AE-6090R heads -- Justin G, 10/10/2005  Sorry to ask again but anyone know if I would have -- Justin G, 10/14/2005 That is a serious mismatch. -- Royce P, 10/14/2005  Thanks Royce! n/m -- Justin G, 10/14/2005

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