Bernie,
My 2 cents.
Just finished re doing mine. I did not check with Row N. for the thin welting that is used inbetween the front end sheetmetal. I tried using a 3/4 x 1/16" webbing and it was to thick. I used a substitute while I looked around. The rear rubber welting and the special rubber front fender to body rubber sold by Dennis Carpenter and Mid-fifty is great stuff.
Here is a link to a bunch of great guys. F-1 & F-100 Ford Truck Enthusiast website.
http://www.ford-trucks.com/forums/forum41/