Julian, my truck has seven spring leaves same as your bottom spring pack. I do wish mine had the overloads since it does need more spring when hauling hay or firewood. The good thing with overloads is they don't cause the ride to suffer, only coming into play when the load increases.
On an aside, that's a nice TR4A! I had a black 67 4A back in the late 70's and sure wish it was still in the herd. Prior to the 4, had a 61 TR3 that I REALLY wish was still around.
Good luck, Ron
