Total suspension travel and spring rates?

[67 Car Guy]

As I'm assembling my front suspension, I noticed that the FFR supplied yellow Konis (82-2598) only have an available stroke of 3". They are mounted at a slight angle, so maybe total suspension travel may be a bit more, but I doubt it will be over 4". I've got the coupe, and I'm not planning to race it. Our roads get a lot of potholes, and our parking lots have speed bumps. None of which are suspension-friendly features. On my last project car, I set it up for a 5" ride height and I had a solid 5 inches of suspension travel. I found that acceptable for daily driving, as long as I was reasonably careful. I believe I set it up to allow for 3" compression and 2" rebound (in other words, at rest it could be compressed 3" before bottoming out). I was not planning to use an anti-sway bar: I drove my last project car with and without it and I could not see a difference. My center of gravity was so low it didn't really seem to help. I've been told the "quick and snappy" high speed lane change is the telling maneuver, but I saw no difference.

Has anyone played with the suspension for increased travel? I just need my front ball joints and I'll be able to see what happens if I increase travel. It looks like I could use QA1 coilovers and they have one that would give me over 5" of travel with the same nominal length, with a simple knob adjustment for shock damping. Same 2.5" diameter springs, 10 or 12" length I think. I'm assuming the 5" nominal ride height would help, and I've read that a number of people have gone with a 5" ride height. I'm sure the tires rubbing would become an issue at some point.

Thoughts?