EGR Valve

Would somebody tell me where the EGR valve is on my 5.0, and can it be cleaned for better performance? It's for a 1990 lincoln Mark Vll LSC. Please either reply to this or e-mail me at jpdunn60@earthlink.net
Thanks

Can't find any data on the 1990 5.0, maybe the later 90's 4.6's will help?
This one...... (http://www.lincolntowncar.org/repair/EGRintake.html)
and This one.. (http://www.lincolnsonline.com/article15.html)
seem to be nearly the same.

Here's something on the 5.0 (http://markvii.homestead.com/tech.html)