leave the 4:11 gears it will pull the hills 100% better 3:55s are nice for half tons whith 216s to keep the rpms down.
but not much good for loads inless you like to drive in third gear alot
you should be able to go sixty all day long with 4:11s and 261 and will be around 3800 rpm
denpending on tire size
my dads 71 3/4 ton is at 4000rpm at 70mph and it has 4:11 gears and 16 inch wheels (I have taken it to 5000 but that was a hole nother story)
