Car acts dead after it gets hot...

Ok I'll go buy a new ignition switch.
now wait a minute.
This is just a suggestion. There are many other things that are different on a v8 car.
It is my highest recommendation that you do not just throw parts at it randomly. please do some other research, get a test light, along with some of the other tools in that thread.
I am only 16, the ONLY reason that I even replied to this is because I went through what sounded like the same problem.
DO NOT take what I have said as fact. Hell, take what nobody says as fact. we are only in internet land and not there. we do not know your car, its quirks, the EXACT situation in which this problem takes place, and about a MILLION other factors.