Screw the 318! I'm going 273!!! Pistons questions.....

Wifes got a 2wd ramcharger I put a 360 I built for a B stock roundyround truck, and she doesn't like the rough idle, the hard starting, or the 7MPG..............

So, I am thinking, for the sake of MPG, to put one of these 273's I have together. What pistons have you 273 guys found and used? Not any that I have found yet on the net. I am looking for a full trunk long skirt piston like the stock one. (long lasting motor)