If you can get rid of the TBI intake manifold the lean running on the outside cylinders will be reduced
and the engine will run better IMHO.
There is no bolt in aftermarket parts for these cars. You have to search the wreckers for things that look like they'll work or get new OEM stuff.
For the front. I replace the struts a couple of years ago and I just put in new end links - highly recommended mod for only $10. If you have a hatch try the sedan front springs, the colt manual states they have a slightly different rate.
For the rear new KYGs shocks will help alot - I also found a set of 86 Saab 900 turbo rear springs that I want to try.