New member ,new project ,new direction.

[R.L.]

Hi Everybody ,this is my first post ,and I've just reciently found this fourm so if I'm asking questions that have been done to death ,I'm sorry in advance.
I have a 72 LWB I've picked up last year and am wonting to make a daily driver out of it .I've looked and the new ones just don't do it for me. I was wonting to make this as fuel efficint as possable. It came with a small block ,350? with a 700r4 .The day I drove it home was a 350 mile trip and it made it 1 full tank of gas.I'm going to guess and say it might have had 1-2 gallons left in it when I got home becouse I moved some things around the yard ,and cranked it a few times just to hear it run ,but the fuel guage was not working so I have no way of knowing how much was in it .Well I just finished a 63 Nova and can't justify two gas guzzlers .Would a 250 ,700r4 up my gas milage or should I keep the V-8 .any body know what combos of tire size ,rear ends would be most efficint in the six application ,how about the V-8 .Any input would be appreciated . I do not know what the rear end gears are but they must be tall,when it went in to 4th the rpm went down. I drove her about 55 all the way and must have got 19 mpg or so.If a 6 will get me that in the city I would be very happy. Any body think this can be done ? "Edit" It's only 295 mi and my milage was only 14 mpg or so.