What kind of vehicle are you putting this 283 into? If it is a heavy car, like an Impala, then I would say you are wasting your money. But if it is a light weight car, like a '30's Ford street rod, then it may be feasible. To get over 350 hp out of a 283, you are going to have to rev it a lot higher than a 327 or 350, and that may require a solid lifter cam. In addition, you may lose street manners with a big cam. I have a 383 that dynoed at 450 hp, and it is so easy to drive on the street, my wife could drive it.