Joe, here is an original 1950, 3604 that was ordered with the overload springs. I know that because I talked with the people that maintained the truck from time of purchase new for the original owner and up until I acquired the truck. As you can see it has a seven leaf main and a 7-leaf overload. And no, this option is not listed in the standard Salesman’s Data Book nor can I find a listing for the option anywhere else.
http://www.pbase.com/dennygraham/image/111951573
Denny Graham
Sandwich, IL


Denny G
Sandwich, IL