Will 6" Lowering Kit Fix Stink Bug Stance?

[SierraMtns]

I am not sure which lowering kit was used from the PO. I went through all the papers and can't seem to find any info. All I can figure out is it is a Early Classic lowering kit but not sure what size. The front was converted to 5 lugs so I think it has drop spindles and lowering springs.

The rear has some room to be put in the weeds. Will 6" springs bring the rear down enough to match the front?

Do I have enough room with the exhaust to fix the rear?

Thanks