Has anyone ever shaved the top 2 1/8" of their 1947-53 frame to better fit the 1954 bed. Mar-K documented this suggestion, but I have to find someone that actually did this. I'm seriously looking into this and was hoping to find someone's completed work. Is it strong/safe if you box it?

from Mar-k
http://www.mar-k.com/54_bed_on_a_53_frame.html

A third choice that builders who are confident in their welding skills may prefer is to modify the 47-53 frame to more closely match the shape of the 54 frame. The top of the frame is chopped down about 2-1/8 inches in the area over the rear axle and is reinforced to compensate for the metal removed. The complete 54 bed could then be mounted on the earlier frame similar to its original location and the bed wood floor could be installed like the original 54 bed. The 54 front bed to frame mounting hole is about 3/4 inches different than the 47-53 bed, which requires drilling the frame for the new bolt location.