if you read correctly i think he said cheap.:yes4.10s and if you have a little extra cash get a tuner.
Also:welcome
4.10's will set you back 150$
install will be around 200-500 depending on the shop
tuner will be 350$ sooooo if thats the "cheap route" be my guest!
Id say start with light mods that will slowly decrease your 1/4 mile time