16” rims

I've run 16's before because I got a great deal on a set of wheels. The tire size you'll need for your combo is what it is. The wheel just dictates the hole in the tire and will get you the sidewall profile you want.

Summit racing has a great filter for tire size.

The rear is easy to figure, simple measuring. The front can be more challenging. I like to get the car to ride height and put it on 4 casters. Using a mounted tire with close to the height you'd want, take your measurements. They make tools for this, I've always just used a mounted tire.