Fiberglass hood mods... crazy?
I honestly don't think that driving down the road you will have that much heat in your engine bay..you always have wind rushing in from underneath and the fan blowing in there.
The only thing venting the hood would do is maybe cool it down a few extra degrees but not enough that in my opinion would be worth the hastle of moding up a hood over.
and the vented hood will do nothing for you in stop in go traffic unless you have some kind of electric fans rigged up at the hole in the hood you creat to evacuate the engine bay air as you please.
I honestly think if what your looking for more then anything is to cool down the engine bay a bit...you could get out of it ALOT cheaper and easier.
I have done this before and maybe it would be something you would like to try.
I have taken dryer ducting and grabed a "scoop" shaped piece and mounted one of each on each side of the under side of the car and then take some dryer vent hose "aluminum foil spring looking thing" lol and route it into your engine compartment that way as your driving down the road it would scoop the air in and force the cool air into your engine compartment... I have also made ram air induction the same way but instead of running the ducts into free air inside the engine pay, I plumed it into the ducting for the air cleaner housing.
So as you drive down the road it forces cool air into the engine and actually makes a good bit of difference!.
anyhow...not sure if maybe that is something you would liek to try but i figured i would throw it out there!
lol....here is a quick example for everyone I put a good 2 minutes into lol...you should all get a laugh at the skill required to render such a portrait lol