My coilovers were built by me. They employ identical parts to the t3 setup. (280zx struts, ground control coil kit, t3 needle bearing top hat.)
I used 200 lb springs and KYB gr2 inserts. The ride and handling are great. Stiff but not too stiff. But could probably be stiffer in the damping dept.
On another note;
I will be starting an SR20DET swap sometime in the next year, if all pans out well.
I just need to help my dad get some of his stuff back together so I can borrow one of his cars while this one is off the road.
I got some neat spares (door handles, ignition and turn signal switches, spare clutch pedal to mod) off a 69 4 dr at pick n pull today. Going back for the rear xmember tomorrow so I can have one to convert to fully adjustable without taking the car off the road too long.