I've been going through all of this over the last couple of weeks. I don't understand how the OP has outside tire wear after lowering his car. When lowering these cars, they gain negative camber. That has to be from toe alignment.
I put Eibach Pro springs on my car when it was brand new, and had it aligned. The springs have definitely settled since then, because I can't get a jack under my car as easily as I was able to. It has 25,000 miles now and the tires still looked new, but the insides were worn to the cores. I bought new tires yesterday, and this is what I'm going with to fix my alignment issues for good.
Front:
SPC FRONT CONTROL ARM CAMBER / CASTER KIT DODGE CHARGER / CHRYSLER 300C (PAIR) | eBay
Rear:
http://www.challengertalk.com/forums/f79/unable-adjust-rear-camber-548585/index2.html#post7210857
I put Eibach Pro springs on my car when it was brand new, and had it aligned. The springs have definitely settled since then, because I can't get a jack under my car as easily as I was able to. It has 25,000 miles now and the tires still looked new, but the insides were worn to the cores. I bought new tires yesterday, and this is what I'm going with to fix my alignment issues for good.
Front:
SPC FRONT CONTROL ARM CAMBER / CASTER KIT DODGE CHARGER / CHRYSLER 300C (PAIR) | eBay
Rear:
http://www.challengertalk.com/forums/f79/unable-adjust-rear-camber-548585/index2.html#post7210857