The best suspension upgrade for cornering?

I've got OE issued 318 with air.

I was thinking Poly Bushings, rebuild front-end, and KYB shocks in the first whack when I do the swap to front discs. Then Swap to 17x9 mustang wheels with 275/40's and a BBP disc rear (I'm pretty sure the 7 1/4 rear and 14" tires are on borrowed time).

Don't bother with the rear disc. You're going to have over $179 in the rear disc. Anyway you could get a 8 1/4?. Is your 7 1/4 right now small bolt pattern? Take rear disc money and buy front T-bars.

Can you find a flaming deal on a LBP 7 1/4? You don't have a mega motor in it right now?

The fun factor of front .99 T-bar over rear discs is like 10 time PLUS.

Then do torsion bars and Adjustable Swaybars (I was thinking about the splined nascar type.). And finally get some nice adjustable shocks. Does this sound like a good plan?

Sounds good. You might want too fit a thick 15"-16" steering wheel and some bucket seats in there someplace.

It's great that you have a road map. Now, figure out the market on those future parts new and used. Then keep on the lookout for the deals and super deals on used parts. Strike when the situation is right. Create your own oppurtunties, create your own luck.