Mismatched rims, your opinon

I have a nice set of 14" rallyes with 225-70 Firehawk Indy RWL tires. Problem is two are 5 1/2" and other pair are 6" rims. The 5 1/2 have more sidewall blip that you can see compared to the wider set and might have more sidewall roll. For my 74 cuda, which set front verses rear? Thx!

In my opinion wider in the rear as usual.

2nd. ronnie