any advantage?
 

is there any advantage of getting new plugs,wires, and ignition box?

sure, especially if your car needs them, smoother idle, better milage..ect ect.

2 step is crazy, back firing and stuff

what? why does it back fire?

new spark plugs and wires yes, unless you plan on using n20, an aftermarket ignition box isn't exactly necessary IMO. Its good if you squeeze b/c they have a spark cut rev limit, where as the stock rev limit is a fuel cut.
Crome has a 2 step, don't need a MSD box for that.
If/when you get plugs/wires get NGK v-power copper core (BKR6E) and some OEM plug wires. I'd change the pcv valve, fuel filter, air filter, distributor cap and rotor and do a valve adjustment while you're at it, make it a full tune up.

alright thanks for the info.

holy post *****..go on h-t or something

if your rich