Faroutoffroad

Hello all! So glad this forum exist! So working on my wife's 07 and trying to change the leaking heater core. Before I get deep into this I wanted to get some advice. I can't find a lot of info om this and what I did find said it was super easy and quick. However, when I got the bottom of the dash off I can't see a way to get core past the blower motor. Any advice is greatly appreciated! Phil