Flood damage

Hey guys, Im new to this forum and would definately appreciate your help. Im not a car genious but I try! My girls 1998 3.8 mustang got flooded pretty bad. She called me with her stalled stang. I had It towed home where I drained all the fluids and replaced them. I also added all the water removal additives I could find. The Oil had alot of water in it. It looked like a mud. I dried all electrical devices. stripped interior to dry. I also bought SEaFoam. Any way I finally got her car working, but still after 6 month continues to run like crap! Its very sluggish and has very low response time. I cant afford to replace her car yet. I thought Id have to replace the engine or the tranny but I heard It might be the cats. If so can I just buy those cheap ass ebay universals. This isnt a race car I just need It to work..........Any tips or advice would be greatly appreaciated .......Good lookin out

You probably have water in the engine which is causing it to run like crap. Bottom line: Take it to a mechanic and get a dianostic test.
Good luck!