how are reliable are 426 compared to 416?

[ranger400ex1994]

i know i am asking alot of questions about the 426 and the 416 but i just want to make sure i am not going to make my motor not reliable. i know there is not much of a power difference between the 426 and the 416 but the only thing i am worryed about is that the 426 is the max bore on the stock sleeve and i just don't want to have to wrry about over heating and having problems like that.

[400exBro]

Call up TC and he will build you a real reliable 426, they seem to have a little more bottom end to them than the 416, so i have been told. But i am getting a 425 this winter and i will see how i will like it.