What he said. Nice reply, Freddy.
There have been recent posts like this, with photos showing the side of the MBW/K case and the crown protruding below the centerline of the case. A problem as significant as that just cannot be overcome. Do a LOT of reading and get familiar with how the piece is "supposed" to look... there will be many iterations of gens. Then acquire the parts to build what you've assembled in your mind. You'll run into specific hurdles, and each of those has been discussed at length here. Some parts work, others don't. Some fit, but don't look right. Others are correct and look strange, until you find a photo of a gen that's exactly like the "strange" part you found.
About the only rule of thumb with vintage Rolex is, there were almost no rules.