1968 Chevy C50 leaf spring replacement

[Campbel45]

Hi,

My C50 is leaning to the drivers side a bit. So much so, that the driver-side, rear overload springs are engaging. I'm wanting to fix this so I've been searching for new leaf springs.

The truck is a typical old grain truck with a single lift cylinder. On my SPID, I have option number G58 and G60. G58= 23000 springs, G60= auxiliary spring EQ.

Now, what's been difficult for me, is finding the correct springs. From my GM parts manual, OEM part number 3818306 is what I'm looking for. This translates to a part number 22-347 for most leaf spring shops. But most leaf spring shops rate this spring at 9500 lbs. Does anyone know if this is correct? I'm guessing the G58 code of 23000 lbs is with the overload springs included?

This whole time I've been assuming that the leaf springs are worn out. Does anyone have any comments on what else I should check?