Cover the top, bottom and side air-intakes with duct tape.
Use a SG2 to keep an eye on the radiator temp.
Here's my 1999 CRV.
Also did the wheels.
The ICE doesn't over-heat and it's about 75% covered over.
If you put the grill block inside, I don't think the aero is going to be as good.
If it doesn't work out for you, the cost was only some tape..
