Drop Spindle install issue...suggestions needed

[HumbleChevyBuddy]

I actually measured from the rotor hub and completely removed the possibility of the issue being with the wheels. For the spring issue, I noticed the truck had a spacer within the spring coils it had before the swap. I'm assuming it was to compensate for this issue. I've checked and reinstalled the springs many times thinking the same thing, as well. I made sure they're in the grooves for the bottom part of the spring.

Just not sure if maybe anyone has seen something else like this. I haven't changed out the cab mounts, I just thought about that. Anyone think it could be that?