Wilf-
The shop that did the machining on my engine advised me that the thing will be 80% broken in by the time I gt done assembling it
Whether it is a race car or a new street car I have always done the same thing which is: During the first 5 - 10 miles I vary the rpms. In a race car it is red line in every gear after that. In a street car or open tracking it is your choice if you want to do the redline thing.
In a street car - change the
oil after 3-500 miles.
In a race car - rebuild the engine after 800 miles (unless it is a FF in which case you do the top end every race and the bottom end every 800 miles or if a leakdown indicates otherwise.)