Read up as much as you can.... but you should go to your local club and ask for help.... it will save you time and money...

There is plenty of videos on YouTube.. search "nitro break in"


Some tips of mine....
Don't rush it.
use a heat-gun / hairdryer to warm it up first... (esp if the engine is very tight)
make sure its Very rich while you run it it..
good idea to inspect the engine before starting... and clean out... (but you may want to have someone help you with this. )



to answer you question on the con-rod.. replace it before you race the engine...

you will find that the guys at your local track should be more than happy to help out with a new engine.. best to go on a non-race day, on the weekend... that way the guys that are there are not focused on racing..

have fun with the new hobby...