Chassis Stiffening - which kit? Cage?, Stiffening before paint, need help. Options

[corpselaurel]

I have been reading and searching. So far I have eliminated the boxed trailing arms.
I want to stiffen the car up before I paint. What 'kit(s)' should I install?

I have read read that most of the pieces in the chassis stiffening kit are useless. Should I buy the kit and install the others?

I have also read that engman's kit helps a lot. And I was also considering the Inner Rocker Panel Frame Stiffeners.

I just don't know which combination I should install. Should I use all of them or do some cancel each other out (for lack of better wording). Post links to suppliers if you mention any.

I am open to the idea of putting a cage in but it has to be in kit form. Does anyone sell one and would I still need any of the stiffening mentioned above with a cage?

The car is not badly rusted except for the battery tray and underneath - completly gone. I will be repairing it. My plans for the car are daily driver with some autox. Next year I will swap in a more powerfull engine. Thanks for any help.

[EdwardBlume]

Thanks for the offer.

I've got kid duty but I'll be springed for the LPR AX on July 25, and for the Zone events in August at Alameda.

With the stiff kit. I understand the theory and its effectiveness with a higher HP car. For an AX application, I want to feel the flex or lack of, and relative stiffness you like to have in concert with your suspension. 914s flex in multiple areas. A welded in cage takes a great deal of flex out of the car. I'm hoping this kit does the same thing, and ideally complements the roll bar as well.