Engine fire melted wiring, vacume lines,and some sensors

sounds like you're wasting lots of cash. Check engine codes? take it to a shop and pay by returning all the unneeded parts? call a cab?
Please tell me you can use a multimeter and read a manual.

did you make sure all plug wires were in their proper order when you installed them ? they all have to be in the proper firing order

We do not have thses diagrams. There is a sticker under the hood that has the routing diagrams.

Has the timing belt been changed? I would check that first. Then go to fuel tests.

I have know by experience that if you cross plug wires you can get an engine extremely hot ive seen it also seen it hot enough to get the exhaust manifolds glowing red if they havent put their hands in it and corrected the problem i would check the firing order to make sure it was correct and that they didnt cross the plug wires.

it sounds like the its not getting enough gas to stay running. try looking for vacum leaks with a propane torch going over all the vacum lines with the FLAME OUT but the troch on when it is idling. if the idle goes up at any time when the torch passes over a line than you have found your leak and replace the line. even if you have one line bad keep going over all of them. and if there is no vacum leaks than start the engine and let it idle for about ten minutes, shut the engine off and take all the plugs out. if any of them are wet with gas than you have a spark problem and then begin going over your cap, rotor, wires, and points.

Most vehicles have a diagram on the underside of the hood that shows the vacuum line routing. Just open your hood and look up!

in your carburetor there is a priming passage. look in there with the air cleaner out and pump the butterfly it should squirt gas. if it doesn't then you need to open the top part of the carb and clean the hole with a hair clip. if this is not the problem it will be the choke but I'm 70 percent that this is the problem.

If the electronics have been cut up it could be anything, also the electronic Qjet does not flow enough for a 355CI V8, I know this from hard won experience on my 82 trans am

I fixed it by buying a new EGR valve and the codes have not returned.