Stang running like total ****z.. HELP?!

I'll try not to bore you with this story, so I will shorten it...

Okay, last week I was driving, and my clutch cable snapped.. I got it pushed into a nearby parking lot. Later that day I had to drive my car back w/out using the clutch. (Bad). I installed the cable, works fine. Now, on my way home, my car feels like it's gonna die, it was backfiring/popping, Sorta sounded like my vacuum lines were disconnected, but weren't. Now, I get it home, blah blah... next day, I start it, starts right up, but runs/sounds like ****. I did notice a big crack on my H-Pipe, where the hanger is, the crack runs along the bottom weld.. would that cause all of this? There is also more leaks than that one too..

If anyone can help me out, I'd appreciate it. Thanks!
 
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