advice for exhaust swap 2005 2500

[Eddd]

i have a 

2005 silverado 2500 hd 6,0 ext cab 8 foot bed. 

 

i want to replace the entire exhaust from a 

2004 silverado 2500 6,0 regular ext cab 6 foot bed

 

its stainles steel

 

can any one tell me what modifications will have to be done? 

 

im hoping its just lengthening the one pipe

 

thank you

 

ed

[CamGTP]

More than likely it is just making the center section longer because of the long bed.

[David89GMC]

From the 2002 Builder's Manual, which should be the same up to 2007.