Welcome to the VTCOA! Sounds like you have some big plans for the truck and couldn't help but notice you are looking for long tubes. Maybe this will help you make your decision...
http://www.vtcoa.com/forums/f14/mopar-headers-catless-midpipes-54660/
http://www.vtcoa.com/forums/f14/mopar-headers-catless-midpipes-54660/