Excellent system. You could do it in an hour or two, if you just cut the old system apart, and try not to salvage any of it.
The one I just installed had the newer flat u-bolt straps, instead of the standard u-bolt type. Much better install since they don't crimp the pipe.
Drone may or may not be an issue on your particular truck. I ran mine for months and decided to try a second muffler(resonator) to see if it made any difference on my short bed 4x4.
It does appear to have made a difference in daily driving, in that when I rev it over 2100, it doesn't sound near as loud in the truck with the windows up. .
If I have the windows down, you hear it where it should be, from the 5 inch tip.
For the price, hard system to beat.