I was contacted by Bill who took some interest in my ideas and who has done some similar work. He gave me my current idea and it does not require me to make my own actuators. It is that of a third spring in front and back and then probably connecting the two for an anti-(double axle)-roll bar. I'll have to do the work of inboard pushrod suspension and the third spring.
This was just a quick rough sketch of it. There seem to be a few different methods of implementing a third spring. I also am not sure how exactly I will be connecting the hydraulic actuator to the front and rear seesaws attached to the third spring. I also can experiment with/without accumulator and pressures for the hydraulic line.
Advantages of the system over conventional:
-low warp stiffness
-allows soft one wheel bump while heave and pitch can be hard
-anti-roll connection does not interfere with soft one wheel bump
-could change third spring stiffness or engaging point depending on whether street or track
Disadvantages
-two wheel axle bump as hard as heave/pitch (this is very difficult/impossible for a suspension to tell the difference between that and change in pitch/heave)