anyone who's used both would agree the 32/36 is better. Twin SU won't give any performance advantage over the single 32/36, and the single carb is easier to tune, less maintenance required, don't suffer from fuel vaporisation caused by radiant heat from headers, which can be a problem idling at lights in Brisbane summers, and certainly for the intended occassional track use.

If he wants a performance upgrade from the 32/26, twin SUs really are a waste of money.