.990 torsion bars for 68 cuda.
I saw you posted an add wanting a manual steering box.
You realize the stock manual box is like 24:1 ratio. Where as the stock power steering box is 16:1.
You can buy a brand new no core new gut 16:1 manual box from flaming river. I know it iron instead of steel, but still lighter than than a power steering setup.
I'm a power steering guy. It the car is setup right and the box is a firm feel there is plenty of road feel input. Much easier to drive in a autocross and with the wide tires a good handling car should have.