5809HKR
Super Comp. Header 74–78 Dodge Ramcharger/W–100/W–200, 74–78 Plymouth Trailduster: 400–440, 67–71 W–100/W–200: 383, Full length Tube Size 1.75" x 29", Collector Size 2.5", Collector Length 8", Port Shape: Same As Port, Black High Temp Paint
Contact Hooker headers or Summit racing
1-800-230-3030 and talk with thier tech guys, They may have what you need and are good to deal with.
http://www.summitracing.com/
Another suggestion is to get the 383 headers and have a muffler shop add to the tubes to clear the steering.