Poll-which rear end?

I went with the 3.91 I ran them with my 416 with 4 speed
Now I took out the 4 speed and put in a 727 with a 242 first gear and a 142 second
And kept the 3. 91 sure grip with a 275/50/17 tire in back about, 28 tall highway is no fun but on the street she is a blast but I think the gas Guage moves faster then the tach lol lol