Rca1965

Hi all, i'm wanting to replace the stock exhaust on my 82 pace car that has the code 7 crossfire engine, i would like to replace everything from manifolds on back, all i can find is cat back systems for the h code engine, does anyone know if the h code exhaust will fit the 7 code cars? or where i can get a system for my car. i also need the air pipe that goes back to the cat if anyone has one or knows where i can get one. Thanks, Russell