Anyone Have Any 60' Improvement Going from Stock To UMI LCA's?

[XLR8]

I know the UMI LCA's have been out for a while now. Does anyone have any feedback from the track? Did 60' times improve going from the stock arms? I currently have the stock original (including 18 year old shocks) rear suspension plus air bags. My usual 60' is a mid 1.6 with a best of 1.56 on Hoosier QTPs 27 x 10.5 (really a 9" tire). I am looking for consistent 1.60's - will the UMI's help?