Hi Jeff,Can I assume that you have a '95 towncar?
Well from bitter experience I have found that trying to build a kitcar around something you have standing around isn't a good idea! You have limited choice, the results is never what you want (considering the amount of hours put in) and generally it just more effort the what you get back.
Whereas if you build something you really want (with in your budget) to drive then the ours spend are well worth it! For a good result it is rare to spend any less the 100 hours on a kitcar (rebody).
As far as I know there is nothing for a towncar.
You are far better if you sell you towncar spend $500.- on a cheap donor for another project.
Anyway have fun with you future endeavours.
-Steffen