What kind of setup is this???

Ye gods. Its a pair of British-made Zenith-Stromburg CD2 carburetors adapted to an Australian aftermarket perpendicular 2bbl intake manifold. Never seen one quite like it! These carbs are very, very heat-sensitive, and that inboard carb is going to run hot. It sounds mean, for sure. I've gotta give 'im creativity bonus points! (and then I've gotta take 'em away…he's fixin' to burn up the #6 cylinder, which is running lean because he's got the PCV hooked up wrong)