obscure question - austin marina

["teds" <teds@accessone.com>]

I have surfed around and can't find the answer to this.

I have a intake/exhaust manifold from an austin marina, circa 1974, this has
an intake manifold that looks identical to the late model mgb's (same basic
engine), and a 1974 no cat, exhaust.

what was the model/size of the SU that was sold with the marina ? I'd like
to try one on this manifold and see how it runs.

thanks, Ted Stowe.