I probably wont run anymore but if I do it will be 1/4 mile. I'm just looking to street drive it and have fun like my current set up but faster. I'm just asking if 500 hp out of a 340 is fairly realistic. I don't care about cam size because its a 4 speed or if I go with the 408 will it be straining with my 4.56s beacause I'm told 408 are more of a lower revving motor.