check out my...

[hamorhead]

air dam and grill block


i just finished so its really dirty
i am monitoring temps... haha i said it first!
the main part is plexiglass
fog grills are cardboard till i get more plexiglass

[gascort]

Looks pretty good - I bet you're going to be just fine for temps with that size opening, especially now that you don't need A/C for ~8 months.
Did you do a front belly pan? my car overheated with the grill block until I did the belly pan - must've had something weird to do with airflow under there.