Rear tyre size

[Heydon]

Hey,

A quick question from a new truck owner in England if you don't mind?

The read arch needs a tad more tyre, what would fit well?

1965 C10 SWB. 3 inch lower in the rear. 8/15 inch Rev wheels. Stock tubs.

Currently running 235/75/15. Looooaaaads of space on the outside of the tyre and some on the inside.

Having read some threads I think that 265/70/15 should fit. Have I got that right? is there anything else I ought to consider?

Thanks for the advice. It is weird, always been a VW guy since school and know them inside out, its been good learning new stuff.