Wanting a 18x9f 18x10r wheel setup am I crazy?

Very cool. I wonder if I could fit a 275/40/17 in the front of my 68 fastback on a 17x9 inch wheel? I have the 73 up disc brake. Currently using a 17x8 with 5.72 backspace and a 3/8" spacer with 245/45/17's....