1999 dodge ram 2500 5.9 360

OK guys and gals I pulled the o2 sensor in the upstream of the cat and the truck does run better and is driveable. Also I took a coat hanger and slide it into the o2 bung and I could feel what felt like a loose canister.
What's my opitions here does anybody make cat delete kit?
I don't want to spend a bunch of money right now I do have plans to mount a single turbo on this truck but not for a couple months.
Thanks again
Aaron