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Old 11-24-2012, 06:02 PM
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Big Block Chevy Mainfolds Upside Down?

Hey gents,

Is there any mechanical issue that you can see that would prevent the use of log style big block Chevy manifolds being mounted upside down and forward for a turbo build?

The turbo will not be directly mounted to the exhaust manifold so it / they will not bare the brunt of the weight. Just trying to see if there was anything I was missing that would prevent me from taking stock exhaust manifolds like this one and mounting them upside down with the exhaust outlet pointing forward.

1973-1975 BBC 454 LH & RH Police Interceptor Exhaust Manifolds 353030 3994045 | eBay

I was also thinking, if I can use these, to maybe cut the cast iron between each exhaust port to help with expansion and contraction issues (I have seen that done before), but didn't know if it would weaken the overall manifold design to much / more than it would help with expansion and contraction.

Thanks in advance for your responses.
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