Jay,
The yellow koni sports I've run for the past 3+ years. Single adjustable for rebound only, but the compression setting is stiffer than the Ranchos I just got. My rear springs are approx 300 lbs, so the ride is pretty firm anyway, but with the Konis or Ranchos the ride is fine, unless I hit a pretty big bump at freeway speeds. Rear springs are non-progressive and is prob the reason I get no squat on acceleration. The konis definitely helped with that too. Everyone keeps saying the stock rear springs are best for drag racing, and I don't dispute that. At stock height the rear camber is better, and you get more squat. I don't drag race so I prefer my car not to shift lots of weight front to back on take offs.
My guess is that with stock springs in rear, or even the Eibachs, the Konis will be ok for launching but still a bit too stiff. That's just a wild guess on my part though. Think about the Ranchos. Made for rear of a Isuzu Trooper. Compression is softer than I would have guessed. The rebound adjusts till you really can't extend the shock. Set full soft, it prob would give a great ride.
Don L.