What range of economy are you looking for? (MPG)...
Here are a few things you could do:
- electronic ignition
- get it properly tuned by someone who knows what they are doing
- convert to manual trans
- change rear gear ratio
- change your driving habits--- ease into the throttle
- I'm sure there are more....
Even in stock form I'd guess you could expect 15 - 25 MPG and after some tweaking you may be able to reach numbers near 30MPG... The thing to remember is acceleration and fuel economy are inversely proportional.
Adding FI would be an option too, but I was trying to keep the list on an economic level.