need auto help

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35KB, 400x267px

>be me head gasket blows on 2003 suzuki areio
>guy notices my car says he wants it
>tell him it has blown head gasket
>he says oh i have one with a perfect engine ill replace your engine for a grand
>talk to him about the year and stuff like that
>its a 2006 suzuki arieo fast back
>say ok maybe ill consider it when i have the money
>gives me his number and says have a good day
now i want to do this but the problem is the 3 year engine range he says it will be fine and it will work, but you know its a 3 year range will a 2006 have many changes in the engine or will i be fine