Yup I have BT leafs. And yeah I might just get a c-notch and shackles and see how the ride improves. And at a later date I can do the Sulastics. I just found out I can do the sulastics with a drop that they provide - so I'm halfway tempted to do the c-notch and sulastics with their drop at the same time.
The 305 is approx 12" wide and the 285 is about 11.25" wide. Granted I think bigger is better but the 305's are 1.5" taller. I think they fill out the wheel well nicely but you're still left with some noticable rake - which is what I'm looking to eliminate. I'd be nice though because the 305/40's are cheaper than the 285/35's!