I bought Eibachs and loved them for the street but they hurt me at the track. So, I cut my stock SRT springs (carefully and with lubricant to keep them cool) and I like them much better than the Eibachs. I cut 1 coil off the rear and it was too much. I'd say you'd be safe with 3/4 coil. I cut 3/4 coil off the front and with a dot 5 pad it's perfect. So cut a little less than I did and use your stock pad.

Les