Damn, it sure is awesome to have the all-knowing AutocroSSer answering my suspension setup questions. This is too cool.
I'm in a 9C1 now, with stock 9C1 springs all around. I'm looking for a ride height that is lower all around, but especially in the front, as I am looking for a slight rake (car is completely level right now). I absolutely hate the look of slammed cars, and don't want to go really any lower than stock SS height. I'd also like to see less body roll, but I think stiffer sway bars are what I'd focus on for that.
A "full trunk" consists of maybe 600 lbs or so of total cargo. My only concern here though is that I don't want the tires rubbing. I only carry cargo a few times a year, so I really don't care how low it sits when loaded, as long as my tires don't rub. I don't want to deal with airbags. I just found out the cc627 may sit a little LOWER than an impala, so unless its REALLY stiff, I doubt it will be able to handle heavy loads without rubbing. Maybe the 507 is more my thing. I don't doubt it can handle the cargo, but with Stock SS sized springs up front (I'll probably find something stiffer and cut it), will the 507 look too high in the back? Also, what's a nice front spring thats stiff and SS sized?