Body mounting hole size on frame?

[Ryan Williams II]

Hey guys, I’m having a similar issue. I need a new frame for my 1999 Silverado, single cab short-bed. I can’t figure out what size the body mount holes are for ordering a new one. There are two options I see. (44mm) & (52mm). I found a place to order a used one from but need this last bit of information before moving forward with a new one. additionally, if you have any other options for places to purchase a frame, I would be glad to hear them. I really do not want the part with the vehicle, i’ve already put some money into it , it’s in pretty decent condition. The Frame is the only thing in rough shape. I will have to get a new truck though, if I can’t do a frame swap on it. It’s bad. Any help would really be appreciated. 
 

VIN#: 1GCEK14T9XZ120220