I recall you had the later low mount starter, below the sump level?
That is the big-bell 200, care of Mike.
The best option is to check emmissions inspections. If you don't have any, your cool, but if you do, then you'll have to run propane or follow a benchmarking test as accepted in some states where you rate two vehicles, one with the stock engine, and one with the mods. Get it wrong, and your car will be slugged by the Feds.
If your okay with proceeding, then go for the 200 six. Its a natural! Going Log engines is the Going thing! They are light, easy to work on, and would take any abuse, from a little 32/36 adpator and headers right on up to a 500 cfm Holley, Does 10'S Turbo or Mustangaroo Supercharger. Pick a combo you like. Nitrous, trippl Offy's, special cams, they all have been used to make this overdesigned throwaway piece the ultimate sleeper!
The little 3.3 is an engine with a heart of pure steel!