Suggestion for truck freight shipping notice on product page

[AWWWW.WAHWAH 1]

We ship products for free but on ocaasion we have products that must go truck freight and additional shipping charges will incurr but that charge is unknown.

here is a suggestion on a mod if someone wants to make it.

 

on the product page, the admin can click a button that will be for "additaion freight", nothing more.

 

so when the customer goes to the product page, there will be a truck icon SOMEWHERE and they will click that truck icon and a window will pop up stating "this item does not ship for free, customer service will call you with frieght cahrges when your order is received" or soemthing of that nature, make it user changeable.