S/S springs or CalTracks w/mono leaf???

If you are planning on driving the car on the street, I would avoid the Caltracs. They are great for a smooth drag strip, but on the street they give a brutal ride. I took them off and sold them. I have two passenger side Super Stock springs on my '68 Barracuda convertible with a 1 inch lowering block. I also invested in high quality shocks, Koni's. I have them set on the second to last stiffest setting and the car rides nice. Bilsteins would be my second choice for a controlled comfortable ride. Stay away from KYB's.

For what its worth I have the 1" from FirmFeel torsion bars in it too. It has a smallblock and automatic in it.

On a related note, I used the same passenger side SS 2800 lbs spring on my 1970 'Cuda with a big block in it and they ride and hook up perfect. I had tried the recommended 3600 lbs SS springs on it in the old days and it rode like a truck.