Please Help !! Engine Starting Problem
 

I need help with a problem with my car starting. I have a 1990 5.0 Gt. When I first start it up in the morning it constantly stalls unless I give it a little gas, then it stays running. After I run it for a while it has no problem starting the rest of the day, until the next morning it is the same thing all over again. I have changed the plugs, cap, rotor, fuel filter, new plug wires, Throttle position sensor, pretty much all the basics but I still have the problem and I was wondering if anyone had any suggestions. I also have a very rough idle now. It feels like I have a cam in it but I don't.

idle air control selenoid, or a vaccum leak would be my guess.