I like the heat cycle method, you will find that a lot of people use this method with great results. You might read about people changing this up but they have a good bit of experience, if you choose this method stick to the directions...very easy and provides a nice proper break in.
Before starting the engine I like to preheat with a heat gun or hair dryer, it makes starting much easier. Also if it's cold you will need to wrap the head with something to bring the temp up...I use aluminum foil during break in (doesn't let air out as easy) and a sock after break in.
From the very 1st time you start your engine, plop the car on the ground & begin running it in a parking lot in 2-3 minute intervals, tuned only *slightly rich* getting the temps up in the 200F range on a normal day. Every 2-3 minutes, shut the engine down & let it cool completely with the piston at BDC, and then fire it back up; continue this cycle until you've run 15 min or so, and then bump up to 3-4 minute intervals. Vary the RPM and don't be afraid to get the temps in the 200's. What you want is heat cycling of the components without the incredible stress that comes with breaking an engine in when it's overly rich & cold. After cycling the engine in this manner for about 20-25 total minutes, it'll be ready for the track and race tuning
