P235-70R15 tire suggestions

For starters, with 15" wheels go to a 60 series tire.
In regards to tire sizes, we need more info.
What car are these going on ?
15"s on the front to ?
Do you want a staggered tire set up, or same size all around?

If its the 71 Swinger in your post, and I'm running to the ice cream parlour, I'm going with a 215/60-15 BFG TA Radial all around.
If you want to stagger them, you can go with a 215/60 up front and a 225/60 or 235/60 in the back.