Louis, where are you? country, state, city, Amend your profile. This will really help you with questions like this. I am just about to begin building a new motor for my SLC. For example, there is a great local shop within 10 miles of my home certified to supply TransAm motors.
This answer will require knowing what you intend to do with the motor. Open track, race, car shows, all street. All require a completely different build.