32/36 DGV requires per Weber requires a low-pressure fuel feed (2.5 to 3 lbs)

With a top hat, it's likely running 10 psi boost or less. So 13.0 psi maximum fuel pressure (3 psi over the boost level). A rising rate regulator makes for more consistent jetting, it you don't use one then the pressure'll have to be cranked up and jetting brute forced

Malpassi rising rate regulator BO18058 Carb Turbo $112 AUD