I just had a couple of top leafs made for the front of my '47 1.5 ton.
Search this site using the search button at top right. There is heaps of info.

Here are the specs for your springs- they are massive
http://chevy.oldcarmanualproject.com/chevyresto/4976.htm

check new prices before you buy second hand, I was surprised ($65 per spring in NZ, although the fronts are a lot smaller).

There is no problem getting the steel to make them. All standard stuff.


'47 Canadian RHD 1.5 ton truck