Want to covert

A 1990 LTD crown victoria wagon.
curb weight, 4200lbs.
range no more than 50, top speed can be 45 or so.
At issue is this, the LTD happens to me the car I used for my mail route until the engine bellied up and I haven't been able to figure out why it quit. (still thinking fuel pump) But, I am looking at converting to save on 3.50/gal+ gas. I am pretty sure I would need to go with the AC motor, using regen braking and direct drive. Would also need smaller motors for A/C, powersteering and brake boost. I live only 5 miles from the post office, the route is less than 30 miles which is why I said no more than 50 mile range. I may stop off at walmart for something or quick side trip somewhere for food or stuff. Other than that I don't need it for anything else.

I am pretty technically savy, I have rebuilt a few engines and can work my way around a car. (just not the friggin computers) So, would this be technically possible? I would even add a portable generator to the luggage rack on top. LOL! Well, looking to answer questions so I can form a plan of attack on getting this thing electrified!

Thanks!