Help with tire size please!

The car is a 73 Scamp. I want to run 16x7 wheels with 4" backspacing, the suspension is stock. I am thinking of 205/60/16 on front and 225/60/16 on back. Will these fit? If they want fit, what will? I am pretty set on these wheels so I just need to figure out the best tire sizes. I would prefer to run the biggest tires that would fit especially in the back. Thanks in advance for the help.