won't idle when hot

['89GTStang]

I haven't exactly removed any of them but the whole emissions system has basically fallen apart. The pipes that go from the back of the heads to some valves and the smog pump (not very up on some of the emissions stuff) have rusted our and of the valves has the end broken off and when I replaced the heads the pipe was blocked solid with carbon and junk. I don't see trying to spend a lot of money replacing parts that aren't going to do much anyways without cats. I tried to use the torch but I could not get a steady enough idle for it to help any plus I know it can be hard to tell any much difference in a fuel injected motor b/c the computer compensates for the additional fuel. I will check the codes again to see exactly what it says but they prolly won't show anything new.