If it has the lnb-support arm still attached, sure you can use it for some fta. A little undersized but should get most of the stronger feeds once you attach a linear lnbf to it. I think SatelliteAV, one of our sponsors sells a linear lnbf that attaches to the stock lnb support. If not, you can fashion one , Ill try to attach a picture of one I cobbled together on a dish500 dish. And yes, even that small dish gets a lot of signals. And please ignore my crappy test cable-connection, I had run out of connectors !
Can you give dimensions and materials?
What size conduit clamp did you use?