let me get this straight. You want to use an m90 (off of a SuperCoupe, i'm assuming), run the outlet air through some kind of air to air intercooler, and back into the existing Blazer throttle body? Where exactly do you plan on mounting an m90, that it will line up with the existing serpentine belt and still allow you to have room for piping the air through an intercooler and back to the throttlebody?
You would be 10,000 times better off buying a supercharger kit made for those blazers. It will be less of a nightmare and more cost effective than trying to create your own.
my opinion.