G'day Blumbly
No that's not the case at all. First pic is the HG Noble barrel I am trying to identify, second pic is my old rotomo bought in 1979. The last pic is off the HG Palmer tiger motor and it is identical to my old rotomo with the exception of the carb intake.

[Linked Image]

I still think its the port that holds the key to its identity.
Cheers

will trade brain cells for alcohol