Well this one took some work but we got there in the end. After being asked a lot of time and seeing that there was not a 1 piece bolt on carb adapter for the single 4 barrel mount super chargers we can say there is now. The Aussiespeed AS0103
The adapter will accept single rear metering block carbs in front to back configuration.
Fit up fairly simple and additional jacking bolts can be used to take the extra weight of the carbs.
The angle is machined on the base of the adapter so carbs should sit flat if your engine is set up at around 6.6 deg as per most manufactures installs.