Great post and photos, I have a much better idea of how this all works now. I've put together the following parts which I have yet to order. I am not sure which inlet duct will fit best so I have two sizes listed. This list comes to about $125 for parts:
3630-3.00-6 FOOT Neoprene 2-ply Air Duct Hose, Black, 3.0" x 6 Foot
3623-Color Air Inlet, Extra-Small Rectangle, 6 x 3.5 inch https://www.pegasusautoracing.com/pr...p?Product=3623
3613-3.25 SS Worm Drive Hose Clamps, 2.25-2.75, 3.25” ID https://www.pegasusautoracing.com/pr...p?Product=3613
ALL42116 Allstar Performance LH Aluminum Single Spindle Duct
ALL42117 Allstar Performance RH Aluminum Single Spindle Duct
7022 ButlerBuilt® Headlight Mount Duct, 7.75" x 5.5"
Alternate, the spindle unit will be a much simpler install but does the 45 degree angle perform better than the 90 degree angle to the rotor surface? The spindle units look like you can drill holes where needed to align with existing spindle screw locations.: R46-003 Richardson Aluminum Single 45° Air Duct