Converting a oil boiler to a gas boiler

[Mike Kooser Sr]

Im looking into getting an oil boiler (9-10yrs old) converted to a gas boiler. I have more of the details in this add I ran on CL to get some inquiries. But does anyone have a ballpark idea what this cost. I already have gas line right next to the boiler that supplies the water heater. In the add youll see the set up the boiler and the converter I was referred to..

https://post.craigslist.org/manage/4130619841/tzkp4