ok so i have 2006 mazda 6 v6 automatic. i need a new motor and i found one on ebay for $1200 wiith 28k on it from a 2005 mazda 6. are those two identical because ebay says its not compatible with an 06? i need to know if there would be any conversions necessary in order for me to drop it in. ps this is my first time putting in an engine and i know very little about Mazdas besides how difficult it was to do the timing on it. someone please help!