Champion rad fit / 73 Duster

Maybe I'm no help here but here goes . A 22" radiator fits a 22" opening and a 26" radiator fits a 26" opening . Take your existing radiator and make precise measurements . compare those measurements to that offered by champion . the length , width and height should be the same or close . The biggest difference is in the thickness . Mopar core thickness starts at the core closest to the fan and any additional cores are added to the front of the radiator so that the distance from the core to the fan or pulley is constant no matter what engine is used . Champion, however, may core their radiators differently which YOU have to determine . My suggestion is to contact them by phone or e-mail with your radiator dimensions and let them determine which one best suites your needs . Sometimes , but not always , folks hack up a radiator mounting flange because : they bought the wrong one , or, they bought the right one and it needs trimming to mount properly . champion is in business to make customers happy , not pissed off . Hope this helps .