Replace A/C in '72 Ambassador

I've got an old Summer A/C that has stopped blowing. This is probably some cheapo replacement by the PO? Seems a waste to try to do anything with it, as it didn't work all that well, and was a bit like standing behind a 747, noise-wise.



I think that I let the "magic smoke" out, as I smelled a burning odor before it went full-on Tango Uniform.



So I have my eyes on one of those 15K Duotherm Brisk Air IIs. I'm in S. Florida, and temps in my Airstream are hovering about 107F.



Has anyone done this transplant? Difficult or no?



Thanks!