Help with wheels

Hi gang, I am going to buy a new set of Magnum 500s from Summit.

I need help on what size I should buy.

Right now I have a set of 215/70/R14 tires on the car.

I want to use the same tires.

I have disc brakes on the front and a 318 V8 engine.

What would be the best size rim to buy?

Summit has many different sizes so I am asking the guys here with experience what to get.

Thanks in advance for your help.

Miguel