RJH1985gsl-se

I have an 85 GSL-SE and the idiot dealer who sold me 14" rims, mounted the tires I brought in but didn't have him mount them on the car because it was November. Well I mounted them in spring and they rubbed on the front fenders
My story dealing with idiots, I know I am clueless about tires at this point in my hobbie but this dealer saleman was so bad I was forced to learn a bit more

When I bought the rims (american racing forgot the model) the dealer told me the 14"ers would fit with my standard se 205 60 14's. Well he was wrong, and at first told me to take a hike because the car was suppose to have 195's idiot didn't due his research although I gave him everything expecting him to be the expert. He even called his vender who gave the green light. Since I needed rims I reconditioned my stocks and mounted the 205, 60 14's. I finally got in touch with the owner and told him that I have free legal council and will be taking him to court. He is offering me Sacchi 14X6 saying they are $35 more each than the ones I originally purchased. I have since joined SCCA and can mount tires up to 7.5" wide. What size wheel and tire combo can I use prefer not to break the bank but I don't want to buy cheap and regret it. Do I I need to go to 15's or 16's. I want to mount some shaved tread tires or solo slicks and dedicate the combo for racing. The do make the Sacchi in 15x7's but I don't trust these guys to make the call. They won't give me a cash refund but I won't buy the tires from these guys. I have read about guys putting on 16" tires. I don't want to have to change anything in the suspension or do any additional work.
Your thoughts? Thans for taking the time to help me.