Shortly after I got my car, I discovered someone had taken a torch and distorted the springs in the front end. I suspect this was likely a response to the sag in the rear that must've been really noticeable after the new springs were installed. Replacement is on my winter list of activities this year.
Seeing this thread made me inquire as to what the cost of a new set of front springs goes for from Espo, so I dropped them a note last night. Reply email was quick and courteous. A pair for the front of my '48 cost $85 + $14 s/h. It sounds like a pretty good deal so I will invest to restore correct ride height when she gets pulled off the road for the winter.
As for the rear springs , I'm think a nice pair of adjustable air shocks with a charge hose routed to the interior of the truck will do fine. I rarely have four people in the car, but holy cow, you can certainly tell the difference with those extra bodies in the car.