My opinion...do what your builder tells you to.
If something goes wrong, he's the one you are going to call, not Dennis, Grape, me, or anyone else...right?
Just my 2 cents
I run mine around the neighborhood for about 10 minutes with break in oil.
Then to the track for hot laps with fresh break in oil. Race that night with the break in oil, then it's on to the normal routine.
granted, I have 1/9,537th the experience of Dennis and Grape, but it worked for me. Last motor had well over 100 nights on it before it started to get tired hot.