My Uncle said that's why he loved his Built 70 340 4 speed Duster, he said he beat a lot of big block cars more powerful then him, had problems keeping up with them as they played cat and mouse to the local spot, but there he'd dominant them pulling a little air under the tire and go. He figured 340 was the perfect size for street racing at least back then, he still has the car but been sitting around for 20 years, trying to talking my cousin in to us putting it back on the road even if it's a beater.