It's a much modified re-issue of the 50+ year old Little T....it's dated in many ways but it's still a very nice kit. A very recent history lesson for you..http://www.modelcarsmag.com/forums/topic/104039-little-tee-packed-with-all-the-parts/
which version would you be willing to accept as inaccurate? (even if Moebius didn't care) most hardtop bodies (if not all) were different than convertibles..different shapes to the top, backwindows and top well...many had extra crossmembers on the frame. i'm guessing most modelers would have little interest in cutting off the roof as well.
Try turning the brake "drum" over. Your pic of the real thing shows what I mean..the "small end" goes inside the wheel. Maybe file the flange to match the fins on the backing plate side of the drums like in the pic? Not a big deal, just my impression.
You may have the parts backwards.....I think the backing plate should be on the other side of the "drum" with the flange against the backing plate. Good idea though....if it's not glued try moving the parts around and see what you think.