15x10 wheels with out mini tub

70 duster
I know I know I know. I'm beating a dead rotten horse, but i have "surfed" and searched till my "board" broke and eyes crossed. So.... what tire can I get a way with on a 15x10 wheel and have it sit as flush to the fender and have it tuck a a couple inches? It don't ha e to be a very tall tire but the wider the better. I don't care if the bead balloons out a little wider than the section. width.

Recap:::::::
15x10 wheels (rear)
Widest tire with spring relocated and with out mini tub
Tire doesn't have to be very tall and want it to tuck a couple inches
Out fender lip will be trimmed and "massaged" if needed.