Sounds to me like you don't intend to do any track or autocross. Why spend money where you don't need to? There's an easy recipe to make your car feel completely different. (with all new bushings of course)
Borgenson steering box
1.03" or larger t-Bars
sway bar
Bilstein or better shocks
Disc brakes
And I'll also suggest frame connectors since it is a convertible.
If you reach out to Peter Bergman, I'm sure he will tell you the same.
I don't think you need tubular UCAs, LCA stiffening plates, K-member stiffening, etc. That will be overkill and wasted money for your intended use of the car.