1973 scamp front tire size.

7" wide wheel, minimum tire 195 ideal 205 or 215 max. 225
4.25 back space may be too deep for your car, I would go with the 3.75 and you still might need a spacer

4.25 is about the max you can go in the front with these Later A-bodies.
I have 15X7 Vision AM Legend with 4.25 BS on the front of my duster with 215/60R15 tires. No rubbing.
I have 15X8 with 3.75 BS and with 245/60R15 on the back I can go bigger with 255/60R15 with no issues as well.
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Vision American Muscle 141 Legend 5 Series Gunmetal Wheels 141H5765GM6