I have heard mixed opinions from many people,I believe its a two way thing.Some people say break it in on the street for 1000miles.Others say soon as you build it dyno it ,and third but not least build it ,then take it to the track.Many people have different opinions.Me myself sure know I dont have alot of money to get my car tuned soon as its running.So I will be getting a basemap then break in and tuned after the 1000mile mark.But I know alot of people that break there car in on the street for 1000miles stock and go traffic.And they never have had any problems from there car.And I have alot seen people that have built cars and taking them straight to the track to run.But me myself, I think its all up to you and if you trust which ever method you chose.I hope it works out the best for ya because when you spent all that time and money one thing you dont wanna see is a leak or smoke.