Ok, i used to own a 1991 Chevy Suburban with a 350 engine in it that needed a new heater core and i never got around to putting the heater core into it before the transmission went bad and i ended up selling the rig. I just recently bought a 1992 GMC Suburban with a 454 engine3 in it and it needs a heater core to. Can a heater core for a 1991 Chevy Suburban with a 350 engine fit into a 1992 GMC Suburban with a 454 engine in it or am I going to have to get a new part?