I am just about ready to install the 360/727 in my 81 Imp and I have to replace the entire exhaust system. MOPAR performance sells a set of headers part number P4529437 which they say will aslo fit all "A,B,E,F and J-body cars. Dynomax sells a set part number 289-85035 and 86035(ceramic coated) which fit "A & B" cars. Does any one know if the Dynomax set will fit my Imp? I have sent this same question to Summit Racing and Dynomax tech lines and have not received a response. Dave U. 81 IMP