highway cruising with 4.10 gears

My car had 4.10's when I bought it and I ran them for about a year until my ears (and wallet) couldn't take any more. Swapped in a set of 3.55's and love them. With the torque of the 408 I have in it now it's a lot quicker than it was with the old 360 and 4.10's... Your running a big block aren't you? The height of your rear tires can also make a significant difference in hwy RPM. Another thing to consider is when you spin your engine harder you wear it out quicker. If it's just a weekend driver it'll last a long time with 4.10's but if it's a daily driver it's a different story.