Has anyone ever replace the blower motor housing on their Blazer with the engine still in it???

No im not kidding. It was a piece of cake taking it off at the junk yard because the S10 I took it from had no engine and no passenger fender.

NOW I have to put it in my blazer
I know more or less how to remove the half next to the fender, but the half thats next to the engine thats what I would need help with. Any help would be appreciated. Thanks in advance.
A little background:
Bought my 2000 2DR 2WD Blazer salvaged due to crash, I guess from the impact the blower motor housing cracked, now I need to replace it. Actuall both the housing cove and the housing are in pretty bad shape. I picked up the housing w/blower motor for $15 @ Pick a part the only thing it was missing was the resistor.

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