Thanks guys, my truck was a 3/4 ton but I don't think the answer would be different because of that. after all it is the dimension that sets the relationship of the front clip to the cab and the body parts are all the same. My best guess from taking measurements on my already cut frame was about 5" so we are narrowing it down.

1953 Chevrolet 3600
Fried Green T'mater (Vern)
In the Stovebolt Gallery
Caution: Political Statement
Man who runs in front of car gets tired, man who runs behind car gets exhausted.