Long Tube Headers Question?

My brother recently had a 1998 mustang GT project. He swapped it out with a 2004 crown Victorian 4.6L engine. The headers are messed up on it so I'm looking for some long tube headers. I was wondering if the long tube headers from a 1998 mustang GT 4.6L engine would fit to the crown vic engine or would I need to get headers for the crown vic? If so what kind of long tube headers would be good for the crown vic engine? My budget is about $400 or less just for the headers.