Sorry, just thinking out loud. We would calculate everything and wanted at least 1 1/2 times the area of the smallest area of the tube. Perforated sheet sometimes has a very small open area. Not afraid of Milodon, they do their homework. Suction side is the limiting factor on even a stock pump. Chrysler used 1/2 pipe on the suction side of Hemi's. Milodon had single and dual pickups straight to the pan for Hemi's and Big blocks. Kit car small blocks had an available pump cover that allowed dual inlets. That pickup might be OK, I'm just a doubter.
McMaster-Carr