Yup, same here!!! More cubes is more torque, torque wins bracket races.... IMO, the 377's were always a pooch engine, to big for high rpm horsepower, and too small for building big torque numbers... You didn't mention what kind of car you're putting it in, but anything more then 2500 pounds going bracket racing needs all the torque it can get and the 434 will out-torque the 377.