I got two of the same type a couple of years ago. A friend helped weld the side bung closed, added a coupler, and took off the end with a plasma cutter.
Originally I used one for boiling and one for mashing. I have a new mash tun now so I converted one to a fermenter. Burner stand is custom welding to support the boiler and accommodate the nat gas jet burner.
Quite a sight to see 50 gal of stout boiling.