Exhaust Manifold for Cosworth V6 2.9 Granada

[kevchard]

Has anyone got or had made up a set of manifolds for a 2.9 V6 Granada Cossie?I am making a Cobra replica with this engine fitted.
Any dimensions (either theoretical or actually measured) will be a help. I am looking at using 1 3/4" steel tubing for the primaries and 2" or 2 1/2" for the remaining pipework.
Cheers
Kevin