Randall AMC stuck 401's in Gremmies that came with 304's and created lightweight, hard to handle rockets, didn't build many tho.. Because of the short wheelbase, AMC never put anything larger than the 304 V8 in them, but the Hornet which is the same car in a sedan, could get an SC/360 package which included a 360/4V and could even come with a 4 speed right from the factory . Randall AMC and Dick Allen Rambler both built some high performance versions of various AMC's