Might be the wingtips. Author may have mistaken it.
Pretty easy to tell the Late P-47D-30 & 35 from the P-47N. If you look, the "Fillet" leading to the vertical stabilizer is a completely different shape and the radio antenna mast is located in a different position.
The aircraft in the color photo I posted above - S/N: 44-33721 is a P-47D-30-RA built at Republic's Evansville plant in 1944.
(Republic Aircraft's P-47's Manufacturing code: RE = Farmingdale Plant, RA = Evansville Plant)