I have a very, very conservative toe-in dialed in the rear in order reduce tire wear.

I might be lowering my car on Spoon progressive springs, which yields a 1" drop. Will the rear wheels toe back in near stock settings, or will they toe out even further towards a 0 toe?

 

Im about 100% sure they toe in. I just lowered my car about a month ago, and finally got an alignment. Got it set to as close to the UK specs as they could... and my previous rear toe for ONE wheel was 0

 

Perhaps the most important thing to do after changing the suspension is to have the car re-aligned. That is the only way to insure that your car tracks and handles properly and the tires do not experience unnecessary wear.

 

Get it aligned.

For the record, the rear toes in more under compression.