Heater Box/Core/Unit Questions. Pics Inside.

Thats what my heater box looks like. Its like that to clear my longtubes, my old builder decided that was the best option to fit them in

Anyway, would this gapping hole cause me to not get heat into the car? I hda the heater on with the 396ci in the car and it wasnt blowing at all, i figured that this hole was the problem. The plan was to put some sheetmetal over it if i ever use the car again.
I still have all the heater lines etc..
So, why am i not getting heat?
Tony.
That is my thoughts, mainly because I am doing Thermodynamics homework hahahaha
Im just wondering if the solution to the heat problem is as easy as sealing up that hole.
Tony.
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sand it up with some 80 grit nice and rough...around all the edges...cut out some fiberglass cloth to the size you need...then start paintbrusing on resin...do another layer after that...when youve got 2 layers...sand it smoothe...(or use an air grinder)
then use a little bondo to get it extra sexy smoothe...and paint it black...

I will be going to the store tommorow to see what i can come up with. My only concern is that the header will be so close to the fiberglass and it will mess with its strength and make it fall apart.
Tony.





