Will this be a "track only" car or is it going to be like a "race inspired" street car. If the latter is true, I would build your motor, throw some forged internals in it and boost it.
Have your looked up the price for a billet crankshaft? Unless you're a trust fund baby, I wouldn't think you would want to spend that money on a crankshaft.
150whp/135lbs-tq @ 13lbs.