A-Body 1968 Barracuda / disc brake spindles which tyres will fit better

Hi my name is Joerg from Germany,
I need help in deciding tyre size in front.
I have A-Body 1968 Barracuda / disc brake spindles which tyres will fit better
on 15X7 rim 4.25 backspace, 1973 disc brake spindles without rubbing:
- 225/60 r15
or
- 215/60 R15

Please give me advice ;-)

Only for info, in back I will run 325/50 R15