Yes, sadly the 1k-5 bed is much narrower than the 1k-3 bed. The frames are identical, I believe, at least in as much as the ROPS bars go. They will bolt up just fine, aside from the bed in the way. My idea I am kicking around is to get another set of 1k-5 rear ROPS bars (sold the first set as I didn't have time to mess with it and needed the money back until I figured this out) and take some great measurements of the bed overlap (width from the frame to outside of bed), remove the bed, and bolt up the ROPS. Then see what my interference measurement is. I want to be able to mount a factory 1k-5 roof. So I will basically identify where I can cut the ROPS at the top (vertical tube) and the bottom between the mount and the mandrel bend (horizontal tube). then basically that section will move out about 3" or maybe 3-1/2". Bottom tube extension will be an oversize tube/pipe to fit as a sleeve extension. The top extension will be basically a set of 1/8" plates in a parallelogram shape, maybe 3" tall, and same width as the offset I need to create. the cuts will be at the same height, and the extension plates will run from center of tube (upper) to center of tube (lower). Almost a diamond shape, actually. Tack it all up, do the other side, make sure its all square and back to "original" as far as the upper part of the ROPS (roof fitment!) then weld it up. And I will fabricate and add in 1/8" plates to box out the splice, to keep water out as well as add strength. Yes I am a certified welder, and certified weld inspector, so I do know what I am doing. It may be a while before I get around to doing this project, so here is the general plan if anyone wants to make use of it. This is the "best" way I know to make a set of factory roof compatible ROPS without a complete custom job. If anyone needs more details I will be happy to provide them, just DM me. Thanks!