Coil springs and braking

[76Kroh]

Ok so everything has been replaced on my truck that has to do with brakes, unless there is something I am not aware of, and they have been bleed and adjusted several times. With all of that it still pulls left brakes. recently I had to buy a set of used I beams due to the previous owner lowering the truck the wrong way. when I did I noticed that one of the springs is shorter than the other, but I was told that is normal because of the extra tanks they used to carry. Mine no longer has an extra tank tho. when it's pulling to the drivers side during braking I notice that the passenger side of the truck is dipping down a lot further. Can this push left be due to the shorter spring? also I am Not sure if the springs came out of a 6 cylinder or a v8 truck. I know they have different coil springs. Any help would be appreciated.