depending on how good you are with electrical. it might take you months. or it might take you a day.
some wires are the same collor, some are diff. that is something you will have to find out as you are going thrue the wiring.
also, the stock tranny wont last you to long(you will be putting over 2X the power thrue it). when your are looking into getting an engine, look into a package deal that will come with a tranny/ front and rear axles/ rear diff/ brakes/ suspention.
its not smart to have an engine in a car that has 250+hp, and that handles like a boat and that cant stop.
do your suspention and brakes 1st before you do the swap.