What year? Have money burning a hole in your pocket? If she is 65-68, I think you can break the bank and get a Griggs Racing front susp. It's VERY pricey, but it's road race/autocross quality, and your performance will be amazing. It will be rough, if you have soft susp on there now but if you have a more 'sporty' setup, with heavy susp, you may not notice a big change. I've even seen some people run the road race setup, then swap rims, and adjust the susp, and run 11-12second passes at the strip. If you are just looking for a soft ride, for cruising, i would probably just change shocks/springs out to suit your needs. Discs all around, or atleast upfront? if not, it's a good time to change.
If she is #'s matching, I'd stay with something that is easily reversible, if ever be the need she had to change homes. If not # matching, go crazy do what you want. What ever makes you happy is the way to go.
Personally, I enjoy a tight, sporty ride over the 'weekend strip car' feel. I like to throw her in corners, and come out with the engine singing. not too keen on straight line, shift kitted auto trans =(