doing radio install from single din to double din, is it easy,what do I need?

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ok so im doing a radio install as a present to my mother with the gps n ect. ive done plenty of double din...and single din...but never one to the other, will I be all set with just the radio install kit or will I have to find the brackets for the double din head unit ive watched numerous videos on it and most of them state that I will need to take the brackets from the stock double din head unit and place them on the new head unit...wich I currently do not have as I only have the single din head unit