There is nothing "race" about that build but realize that magazines use the most "optimistic" dynos around. If you go with a different cam but the same heads use that duration or LESS. More lift would help and a tighter lsa. Large port vortecs would be a big step up in power but will lose a little low end tq.
Its a nice build but can be improved, with the right improvements the numbers you get will be closer to their fantasy numbers as well.