I curently have stock rate replacement springs in my 65 fastback with 5 leaf springs in the back and kyb gas adjust all around. i have the negative wedge kit on the front and had cut the replacement coil springs a little too much so its too low as i mentioned on a previous post. i could either put a set of 1" coil spring insulators or put in some used stock height coil springs from a 6cyl. i hear about 5.0 guys running 4 cyl springs for drag applications. would the 6cyl springs be a good idea? also, will drag shocks make a noticable difference over my kybs?