It will move as much as the piston to bore clearance allows, which could be as much as 0.004" to 0.005" on a "built" engine. More than that means you need new pistons.Should you be able to move the piston side to side a bit or would that mean it needs new rings
I bet the guy meant to say that the rings were gapped for nitrous. The ring gaps for nitrous motor would be slightly larger than they would for N/A motor. This is because more heat is generated while using nitrous and the rings would expand more. This is considering your motor doesnt really have some high strength rings for heavy nitrous use.He also mentioned something about the rings being made for nitrous that also causes a little movement is that correct?
And thank you sir for all your help