If you want the hole for the scoop to be over the air cleaner measure from fender to fender and cowl to center stud on air cleaner most engines are off set to the passenger side
I'm 40 miles out of Iowa. Gravel is the worst to have it's always letting moister up from the ground. Metal buildings are great if there insulated. My building is 45 X 40 12in walls and 18in insulated ceiling, has hot water heat in the floors, concrete poured over plastic then 2in pink board...
When I put the 383 in my 72 I had the same issue. From the looks it's rubbing, somewhere I read about this problem and how to solve it. The fix was heat the corner of the oil pan take a flat body hammer and a second hammer and tap in the corner of the pan DON"T use a torch just the small propane...