This is a case of running-in a partially new engine, no doubt about it. Engine in a newly delivered car is run-in under lab/factory conditions but here you have installed brand new parts which are yet to see light of the day. Driving sedate for sometime isn't a bad idea, i am not sure for months though. I am particularly interested to know if the performance is intact but the answer is a month or two away, never mind keep my query with you and let me know. None the less, It was a joy to see your car back and that sense of relief in your post.