[wensum]

I know of two speedsters here in New Zealand, one with twin SU's and the other with twin Strombergs off an earlier Holden.
The owner with the twin Strombergs claims to have tried twin SUs without success, but the owner with the twin SUs races and drive long distances with great success.
In fact both cars go very well!
I think the twin SUs are 1 3/4"
Keith