Is it too much to ask for a repacement part to fit correctly. My old heater core after 23 years started leaking onto the driver side floor. I know it's only a heater core and it's summer time but I"m the type that likes things to work. So I removed the old core by removing the heater box. I've gone through 4 heater cores(3 from O'Reilly's and 1 from Autozone). The one from autozone fits the best not perfect. It will require some modification of a bracket and angle. It's just a heater core. What the H...! Rant over.