Clarkie,
Motorcraft 9mm go good and get the wire looms to fit (from Summitt is cheapest)
http://www.summitracing.com/
Kevin has nice article on them:
Spark Plugs & Ford Racing Wires, Installation Tips by Kevin L at kevin-long.tripod.com
if you have a 5.0; watch out for cable routing to avoid misfiring:
Spark Plug Wire Routing for 5.0
http://www.supermotors.org/clubs/sup...a.php?id=72380