[TRmachwon]

Not sure how they hold up to drag racing, but the Eaton posi and TruTrac are probably your best diff choices.

MM XD spherical LCAs (not sure how the road race ones hold up to drag racing, might be worth asking them).

Watts link requires a torque arm also. Your options would be to dump huge money on the Griggs watts link setup, or try the Fays2 watts link and a different manufacturers torque arm. If you want the simple and stupid method, get the MM phb and HD torque arm and call it a day.

Coilovers a good starting point for spring rates is 100lb lower than the fronts. MM sport/race dampers (perferably) or Koni DAs are your only choices for handling.

Upper shock brace = shock tower brace? Useless.

And before you spend any money, throw away any hope of it ever "handling like an F1 car".