sorry my answer was not very clear,in addition to the 4 pcs in my previos answer ,you also use the same side roof panels as the soft top,thats why they have holes drilled in thm ,and yes they do have the same curve front to rear,the top is also curved from side to side to match the windshield frame,i have a memphis equipment catalog,that has a really neat looking m211 with chrome wheels,and a custom made fiberglass top ,a color picture ,as to how many manufacturers ,who knows,i am going to a salvage yard that has 5 of these trucks in it 3 of them have hard tops,1 of the trucks is acanadian ,i have already taken its data plates on previous trip there,will look at all 3 and take pictures,i would post pages out of the tb 9-2855-17 if iknew how to scan them to this forum,to clarify this ,im not very computer literate,someone send me directions on how to post pictures,and scan pages to this site, i would like to post apicture of my truck, am going dec 20 to salvage yard 1 truck has complete winch assy and pto unit and all cab controls ,if anyone is interested,will keepscavenging parts off of all these trucks,got to go my finger is about typed out,merry christmas to all