Hey i just bought a freshly rebuilt roller 5.0 motor. it has dome pistons and new everything. i am putting it in my 84. i race my mustang and i have a big race on the 5th. my tags have expired so i cant exactly drive it on the street. how should i go about breakin the motor in. should i try to break it in or just fire her up and hope it holds together. i was told that on the inital fire up the rings will either seat or not. is that true? thanks