nitrous shot ..what size?

Just bought a ZEX wet nitrous kit! want to know if the stock fuel system will be able to handle a 55 shot ? Also do i need to retard the timing at all? would i possibly need a s-afc ? or im i good just to throw it in there?any help would be appreciated?

I installed NX wet nitrous kit at 75shot. But mine is a Gen.3 3S-GTE engine where the fuel pump n injectors can provide enuf fuel. I suggest you check out if your fueling is able to handle the 55shot n20. And dont forget getting colder plugs.