Hi all.

About 40 000km ago my A12 engine was opened due to overheating.Me and my dad did it.We replaced rings on the pistons and bearing caps on the conrods.The head was also totally overhauled.Now I want to open up the engine again in the future to balance it and put some sidedrafts on after that.
My question.The car is still running the standard bore and there was no wear on the sleaves.It actually still had the honing marks from the factory and no reach at the top.The pistons also had no play.
I just want to know if I must replace the conrods even if they do not have wear.I will take them in for measurements to make sure about it. Have they not weaken due to hot cold hot cold in it's livetime. I am going to ring it's neck when balanced aiming for 8000rpm.
The engine currently has 140 000km on the clock. +- 40 000km of this was after the head gasket blew and we needed to do the stuff as mentioned above.