So these blocking plates? are they the upper and lower fillers between the grill and radiator support? I'll have to look at my 400 car, neither of them have A/C.

It looks like there are a lot of repo fan shrouds with mixed results. Any that you guys recommend that fit the 7 blade fan? This engine dyno'd at 530 hp, 570 ft/lb tq so I'm hoping it will be fun to drive. Can't afford to have it overheating.