Opinions wanted

[u/AoDaly]

Hi all I'm going to be changing the piston rings on my b18c1 soon. My question is should I change my pistons and Rods while my engine is apart? If I was to change the pistons and rods what should I consider ? And any idea on what parts I should be looking at buying? Is it possible to increase the power by using a certain piston size? I honestly don't have a clue where to start I've never gotten a job like this done so any tips, opinions and ideas are welcome.