Here's mine setting on Steeda Sport springs. I have the Koni SRT.T shocks and struts, but I've heard the KYB GR2s are decent for the money. I also have MM adjustable lower control arms so I can raise or lower the rear of the car from where it sets in this picture.
The only lowering on the rear was to relocate the rear mount for the lower control arm. The fronts are coil-overs, so yes, just adjust to suit. Both these suspension heights were set from my previous wheel and tire setup ...
These are 245/50/16 (25.8" tall) front and 255/50/16 (26.2" tall) rear. The tire diameter makes a difference in how it looks in the wheel well. The current setup is 255/35/18 (25.1" tall) front and 275/35/18 (25.7" tall) rear.
Sorry for such a long wait for a reply....had some issues here. There are quite a few companies making coil-overs for the Foxbody, but my customer decided to go with a lower priced kit (about $1000), and he is very happy with it. This car is also a 306 with a Vortech and a T-56, and that has not seemed to be a problem.