I cycled my tank with 2 day shipped fiji rock and it had an ammonia spike as expected. I had overnite cured LR
from FL shipped in a different batch that I added and did not cause a spike at all. This was in an established system. I also had some FL LR
overnited that ended up gong through a hellacious cycle and stunk up half my house for weeks and required daily water changes.
Check it when you get it. Smell it and examine it good. If it stinks or has a lot of black on it, it will probably have an ammonia spike. If this tank is new that is ok. If it is established, then you might want to cure it in another vessel. The batch that I had stink I think was from some hitchhiker clams that died off. Not to worry you but it depend on the rock and how it ships.
Good luck. I was so excited when I got my first few batches of LR
. Good thing I don't have to buy that right now! Corals are expensive too though