trying to find right tire size for 17x5.05 backspace

[Thatobs89]

my 2 rears are 275/75r15 and 3.37 bs which I believe wont work when I lower the truck 4/6 but I'm hoping to get 17x8 with offset of +14 and bs 5.05 will they work? and what size tire would I need to make a good rear beefy tire that would still fit on the 4/6

Thanks -thatobs...