Upsize wheels for 90 Lumina

I'm considering purchasing 20" wheels for my 90 Lumina. A wheel and tire package i'm thinking about comes with 245/35R 20 tires. I'm just not sure if I'll have turning clearance with the 245s. I currently have 225/16s. Anybody out there have 20s on their Lumina or would know if these wider tires will clear?

Talk with tire store or custom shop & have them try one on the car for size. Best way to tell.