I have a 1994 5.0L Mustang, and took a pair of GT40P heads off of an Explorer (can’t remember year). I know there’s several posts about correct-fitting exhaust headers, but I can’t seem to find any for sale. I’ve searched for MAC, FRPP, and Motorsport, but I couldn’t find any for sale. Will I have to settle on BBK headers and 90° spark plug boots? If so, what length is recommended?