From motor trend drag week description.
"Harkening back to the 1960s, the Gasser category endeavors retain the flavor and feel of the Gasser wars, with restrictions that limit the style of lettering, hood scoops, and even limiting the use of front A-arms to either stock, or completely replaced by a straight axle—no Mustang II-type front ends allowed. Only 8-71 or smaller superchargers can be used for power adder, but no turbos or nitrous. B/Gas rules are more lenient making for a more affordable class in this fun category."
It seems Finnigans is a Mustang II style. Because that is what Scott's Hot Rods builds.