breaking in my 350

hey i was just wondering whats the best way to break my rebuilt 350 in and will i have to tighten any engine parts like my valve tappets and such
thanks alot travis

if it is rebuilt and has a new cam you need to break in the cam. You need to run the motor for 20 minutes at about 2500 rpms. Then you need to put 500 miles on it. This 500 miles you should drive it like you would every day dont pound on it but dont baby it.