Locally Robert Fulco has all the best equipment, knowledge, and resources to build the best. But he does not come cheap nor will it happen quickly but like anything else in life you always get what you pay for and good things come to those that wait. I just spent several months researching this very topic and all of the hardcore guys came back to Fulco everytime.

Keep in mind too that there are engine builders and machine shops that offer building as a secondary service. Make sure you do your homework and choose wisely.