Here is the older post which has a lot of good information in it regarding the beds for 35/36 Pickups, and a few things to know if purchasing a Mack Hils bed.
https://www.fordbarn.com/forum/showt...=290934&page=3
Some people have been happy with their products, others, including myself, not so happy. With the amount of time I spent correcting the Mack Hils bed floor and stake pockets, it would have been quicker to just fix the original panels. I also purchased the wood underlayment and the bed filler panels but I did not use either due to poor quality. The cuts in the wood were incorrect and looked as if they were done by an amateur. The bed filler panels were the wrong shape. The bottom edge was flat but should be curved to match the running boards and the bead was the wrong shape. I only share this information because it is my honest experience and I wish I learned of these issues before spending the money on the parts I purchased from them. Depending on your skill level, most of the issues I had with their products can be corrected but may not be practical depending on the condition of the bed you currently have. Just don't buy their bed or bed parts and expect them to not need any work. Regardless of which route you choose, I am happy to help however I can if you need some more info or guidance. I feel I have encountered all of the problems one can have while restoring a 35/36 pickup bed and hoping my experience can help others.