416 stroker ???
It's funny how different people have different info, not saying wrong just different. I went with Eagle SIR rods because I heard from a guy my brother has build his motors that the Scat stuff breaks so he quit using them and went with Eagle stuff with so far no failures. So now we have both sides saying that one is better that the other with real life experiences.
It sounds to me that it doesn't matter which one you use, Eagle or Scat because both have, thru examples, about the same amount of failures. Heck they probably come from the same Chinese factory.
My next motor will be a stroker mainly because I will be able to run the same, if not better numbers as I do now with a milder motor.
If you already have the 340 I say stroke it but if you do not have a block yet I would use a 360 because they are cheaper so you will be able to use the money somewere else in the setup.
Chuck