Im going forced induction so I’m looking at the LQ4/LQ9 iron blocks. I plan on having the machine work done and dropping all new internals into the engine. I know the LQ9 has better pistons and rods, my question is since I’m going to beef everything up would I be better off looking for an LQ4 since they are normally cheaper? I’ve also read 2005+ is best if possible? I just want to make sure that other than rods/pistons the motor are identical, because if not I’ll pay more for an LQ9. I also am going to run a 4L80e did they ever come behind the LQ4s or only some of the LQ9’s? I’m assuming I’m going to have to reflash the computer no matter what.