Question on 70 Dart wheels

On a 70 Swinger 340, this car would have come with the 'small' bolt pattern, right? Looking at wheels, and the offer both large and small.

Also, I want to go with Mopar steel wheels with repo dog bowl hubcaps. Will they fit on the 15's? The hubs would be identical I would think as on the 14's.

I want to go 15x8's on the rear, and 15 x 7's on the front. Does all of this sound doable? Thanks everybody.

Steve