Coilover Recommendations

[TheJDMan]

Just discovered this thread - as I was about to start a thread with the exact same title: Coil Over Recommendation. I am coming from stock 2nd Gen suspensions and upgrades like the Hotchkis TVS kit. This is my first car with a Q-Link and coil overs and I m learning as I go.
Car is a 1973 TA with an LS9 and a T-56 - if that helps ‘estimate’ weight? I’m guessing this car is in the 3400-3600 lb range? The LS definitely shaved some weight off the nose as compared to an iron-headed pontiac 400/455. T-56 isn’t far off from the weight of a TH400.
Car has DSE front subframe and Rear Q-Link with mini-tubs. Prior owner said the shocks and springs are the ones that came in the complete kits from DSE. For as long as I have had this car, I have thought it rode unpleasantly harsh over the slightest road irregularities. Cpd004 - my experience matches your description of ride quality to the T. I also would be happy to raise the ride height 1” or so. The stance looks incredible, but catches most speed bumps around here
Took her to a local shop and they pulled the shocks and found out that they were completely empty. FWIW - these shocks are nitrogen filled, which the guys at the shop indicated aren’t really for street driving. They filled them and left them on the bench overnight and they held pressure, the were so re-reinstalled. Ride was obviously noticeably better than before, but still can be pretty unforgiving.
For my purposes, I definitely would be glad to give up some handling capabilities for ride comfort. This is a street driven, fair weather cruiser, I do not drive the car competitively.
Right now, I am just looking to see what the typical range is for spring rate / length / and shock travel. Like I said, this is all new to me and I am trying to learn as I go along. Thank you all!

Just to give you some specific info, I'm also running a DSE subframe and a 4 link rear suspension. I have AFCO 4" stroke coil overs all around with 800# springs up front and 350# springs in the rear. In the past I ran much softer springs but was not happy with the way the car felt at high speed. After some discussion with Rod, I upped the spring rates dramatically to where they are today. Surprisingly, the higher spring rates still give a good quality ride on the street with the shock compression backed off a few clicks.

[PDC]

This is great info and gives my a good idea of what range of spring rates to look at. This spring, I will get under the car and see what my current set up is. She actually does feel pretty good right now, but that sure doesn’t mean improvement isn’t within reach.