The chain, tensioner and rails are brand new and the cam timing is dead on (well almost). So I´m not worried about that. I advanced the ignition timing with 5 degrees to get a bit more performance. I´m keeping my ears open for any signs of pinging because of the advanced timing.
In most engines without a knock detecting sensor there is some room for advancing the ignition to allow for fuel variations and high ambient temperatures.
Since I´m living in Sweden and running on premium gas I though I give it a try.