I dont know a thing about the 484 cam, but i think 383man ran it in his sons dart with almost stock 383 and ran 12.30s. Big cams in low compression 440s can run well. Throw a 3500 stall in it and it will feel like a different car. Then if you are still unsatisfied with the performance you might consider a cam change.Even if you choose to put a smaller cam in it, the convertor will be a big boost.Should be an easy 13 sec car with street tires,12s with slicks. BUT, before you spend any real money, make sure what you have now is tuned properly.