There is a complete how to article with good pictures on how to do this on helpwrench . com
Here is the link
http://helpwrench.com/forums/showthread.php?6-4.3-5.0-5.7-Vortec-Intake-gasket-replacement-guide-pictures-directions-and-pic
Yes, You have to remove the intake to get the heads off.
The starter is under the intake manifold. You must remove the intake to access the starter.
Yes you do. The distributor must be removed.
Remove intake manifold, exhaust manifold, valve train, and heads. This is a major repair that should only be attempted by a professional.
Remove the intake manifold, remove the exhaust manifold, then remove the heads. Replace the gasket and reinstall everything. Unless you know what you are doing this is a major repair best left to a professional.
There are 2 of them and they are both are up under the intake manifold. You will have to remove the intake to get to them are even see them.
The egr valve on the 1999 vortec v6 is bolted to the intake valve. It is just behind the distributor.
under intake manifold
Under the intake manifold.
I suspect you have V6. If it is the case, you will have to remove intake manifold. There is no other way to replace it.
Yow have to remove the entire intake manifold to access it. I highly recommend taking it in and having it done by a pro.
The cam shaft sensor on a 1999 ford escort is on the intake side of the engine just below the intake manifold. The intake manifold has to come off to take the CS sensor off.