Brian, in case you go for the drop tanks as shown in the photos of the plane you want to do, those are not the 75-gallon tanks, those are the 110-gallon tanks. If you have an Eduard P-51 kit that has the large drop tanks for the VLR version, those tanks are one of the two options (and if you do the VLR as an Iwo Jima plane, you want to use the other tanks, which leaves these as "extra"). They might look like the 75-gallon tanks, but they are larger.
Another point (easy to fix): on a NMF P-47, that area behind the cockpit under the canopy is unpainted aluminum, not painted the interior color (on a camouflaged airplane, it was painted the exterior OD color). Like I said, an easy fix.