Heater Core

I think...my memory isn't the best....that I used it for the driver's side fresh air box to cowl. Seems like I may have needed to cut it and make it smaller so it would fit.

Let me think in it!!!
I cant beleive it 66 put it alll back together and it wont switch over to defrost ,i feel maybe i have put the heater box back together in correctly .I have A/C .The flap at the bottom opens and closes were the defrost tubes go properly opens and closes but no air
.im puzzled