i have a 02 gt with a seized motor. i was going to get a 4.6 from a newer gran marquis like 07-10. will this swap right in or is there a better year or motor to get? i was thinking the gran marquis because most likely hopefully had one older type owner (so less abuse on motor) and the price is around 600 compared to 1600+for a mustang motor . any thoughts or suggestions would be greatly appreciated