Need to improve mileage!

[JustinR]

I have been driving my 71 chevy k10 everyday now and am tired of filling up more than once a week! I am trying to look at all my options.. buy a new car, new gas truck, diesel truck, or try and get better mileage out of my k10. The problem is I need a truck for work, and my k10 works perfect. With the cost of a new truck, more expensive plates, and having another vehicle to maintain, I'm thinking that isn't my best option. My truck has a crate 350 with 15,000 miles on it, th350 transmission, and 3.07 gears with 32" tall tires. I am pretty sure I could pick up some mileage going to 3:73s, just because of the bigger tires. I am also looking at fuel injecting it. I was thinking my options were to go with an edelbrock fuel injection kit. Or find a gm throttle body injection setup. I would even look into swapping in a newer 5.3L if it were worth while. Another reason for wanting fuel injection is because of the really cold winters here, so it would be nice to have.

Please give me your opinions, thoughts, ideas, or whatever else!!

Thanks!