Even if you build the motor you'll actually lose money. Why because if you choose the wrong parts or buy the "good" stuff, you'll end up selling for less then what it cost. That is unless you already have all the parts or can get them at great discounts. The best way is to sell it as a complete core (if its running the more you'll get for it) and let the new owner build it to their wants/needs. That said, it never hurts to have a working BBC to stuff and in SBC GM car and sell it that way.
