Receiver hitches

[77 C-20 Scottsdale]

Does anyone make a class IV hitch that does not require drilling to install? Some companies say no drilling, but that is totally false in many cases. I was looking at a Reese 37087, which claims no drilling required. I only see four holes in my frame, not the six that are needed. Not even sure if the four holes I have would be a match for the hitch, which would only need two additional holes drilled. Hoping also to find a hitch that will not interfere with the spare tire rack. Any photos/information will be appreciated. Thanks in advance.