Water cooled exhaust manifolds for a 304 EFI V8

[gwhastie]

Hi again.

I am about to marinise a Holden 304/5 litre EFI V8 and am after a set of good water cooled exhaust manifolds. Holden 253/308 blocks are the same as a 304, but the 304 EFI heads are different as they have equally spaced exhaust ports....totally different to standard 253/308 heads.

For whatever reason, all of the new 304 efi exhaust manifold sets have increased from $995 to $1450 this year, so I'm chasing a used set if anyone has some please. Alternatively, does anyone know if any other V8 water cooled exhaust manifolds are interchangeable......for example, BBC heads have the same looking exhaust port spacing and angled stud pattern as 304 efi heads.... but I haven't had an opportunity to measure a BBC head.

Any feedback would be gratefully received.

[Alan]

Ford Windsor are close and were used before the manufacture of dedicated ones, the ports are a bit small and the bolt pattern needs changing but an option.

[gwhastie]

Thank you for the feedback