We had another long thread on this issue before.
Use the tire calculator from discountire.com then read the specs for the actual brand either there or on tire rack.com or sometimes you have to go to the vendor site to get the exact dimensions and the wheel width limits. Tire Dimensions Made Simple - Discount Tire Co.
Then refeer to the other thread to see what the max dimensions are that dont rub.
Also your supposed to check the wheel specs to see what the max size that will safely fit, if you exceed the wheel or tire spec some shops wont mount or service them.
I hevent found them for the old BBS 14x6.5 basket weaves yet.
I feel your pain though.
Let me know how it works out.
Now I'm thinking I could go a little wider too maybe 215 55 14
but 235 70 14 sound like a weird tire size.
sounds way too tall
Maybe on my old 67 Mustang or a truck.