im trying to get as much rigidity as possible in the rear. i ordered a megan panhard bar that has pillow ball joints, i plan to get techno toy tuning heim joint control arms, and a tanabe 19mm or 20mm rear sway bar. my question is, is it really worth it to use a rear strut bar on these? if so, how would you mount it?

 

no pointers on stiffening the rear end on an ae86? will the megan panhard bar, tanabe sway bar, and techno toy tuning control arms be stiff enough?

 

stiff enough for having fun with.
I would worry about the bushing. if your car is anything like mine is, start at the bushings

 

anything is going to help.

you could get some steel stock and a buddy with a welder and weld up all of the seams and weld in some reinforcements in the weaker areas. You can stiffen the suspension as much as you want, but the chassis itself is going to flex all over the place.