Rear tire size needed for 340 stroker?

Hello,

So I have a 73 340 in my Duster.
I plan on upgrading the power within a few years (stroker etc)
I would like to get new rims and tires sooner than that.
If I was to upgrade with a 416 stroker in the future, what rear tire size would I need to acomadate that power? Would 275 60 15 be big enough? Or would I need to do some mods? Min tub etc?

Thanks!
Richard