Do we over carburetor cars?

These are the specs for a CASCAR Race Engine,(owned by NASCAR)...CASCAR is the premier late model professional circuit series in Canada.

371 cu. in, W2 cyl heads, 10.0:1 compression, cam is Mopar p#4529972 .555 / .555, 252 / 252 mech
2.02 / 1.6 valves, mopar #p4529408 intake manifold and a 390 cfm Holley carburetor
it dynoed 521 hp @6400 and 472 ft.lb @ 5100

These engines are restricted to 3.58 stroke and one 390 cfm carburetor....