Make sure you avoid low power settings, we avoid any circuit work for at the least 25 hours, but normally up to the first 50Hr, all our engines have made it to TBO plus extension, treat it well now and it will repay you later on in its life.
This is well worth a read
http://www.lycoming.com/support/tips...Operations.pdf
The TDC is here BTW
http://www.grumman.net/cgrcc/a16ea.pdf