Littlebeefy Posted January 8, 2021 Share Posted January 8, 2021 A couple of questions: 1. Is there a fundamental difference between the exhaust manifolds on the EFI 460 versus the Carbed 460 (i.e. are they interchangeable)? 2. I was told that the stock 460 manifolds on the Econolines are "smaller" than the ones fitted to the F-Series. Anyone know if that's true? Thanks Link to comment Share on other sites More sharing options...
myrl883 Posted January 8, 2021 Share Posted January 8, 2021 Manifolds for EFI and carbed engines are different, I'm not sure if they are interchangeable or not. Someone lied to you - E and F series trucks use the same manifolds... Link to comment Share on other sites More sharing options...
85lebaront2 Posted January 8, 2021 Share Posted January 8, 2021 Manifolds for EFI and carbed engines are different, I'm not sure if they are interchangeable or not. Someone lied to you - E and F series trucks use the same manifolds... They are not interchangeable, the carbureted heads have a vertical oval shape to the ports, EFI a horizontal rectangular shape. Link to comment Share on other sites More sharing options...
old55pete Posted January 8, 2021 Share Posted January 8, 2021 They are not interchangeable, the carbureted heads have a vertical oval shape to the ports, EFI a horizontal rectangular shape. Thank you Bill, That was what I thought and dident want to say it and be wrong. Link to comment Share on other sites More sharing options...
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