These photos show the general differences in the Monogram and Heller 1/48th Scale Thunderstreak kit fuselage (unmodified) parts. I tack glued fuselage halves from the two kits together with the intake and tailpipes aligned so the profile differences show. My thanks to Harold Offield for bringing these differences to my attention.
This shows the two fuselage halves from the Monogram side. Note the light colored areas behind showing where the outline of the Heller kit fuselage differs from the Monogram, especially in the vertical tail.
This shows the two fuselage halves from the Heller side. Note the dark colored areas behind showing where the outline of the Monogram kit fuselage differs from the Heller. The contour of the fuselage belly differs also, but is difficult to see in this photo. Note also the difference in the position, shape, and size of the speed brakes on the two kits.
Harold Offield commented to me that he thinks the Heller kit fuselage is closer to correct than is the Monogram, but the wings of the Monogram are better. I don't have enough data to determine which is correct, but there is no doubt that there are differences in the kits. A study of F-84F photos indicates to me that the early blocks of F-models had a slightly more slender fuselage, smaller speed brakes, a much smaller ventral fin under the tail, and what appears to be a more slender (in side profile) vertical tail. Harold also sent me drawings from several publications, and, just as I found with drawings on the Thunderjet, they are very inconsistent. So, what is right or wrong about these two models so far as accuracy? I don't have the answers yet. But, my opinion is, at least they are not grossly inaccurate like the Hawk, Collect-Aire, and Battle Axe Thunderjets were. This jury is still out.