67 Fastback getting 8.8 rear

I have two 15"x7" cop wheels. Which would fit perfectly under the car with the 4.25 BS. I'm thinking with cooper cobras 255/60/15's. However, I did see these 19x7.5's with a 42mm offset and wondered if I can make them fit. Anyone run 19" with success? They come off a 2008 Dodge Caliber CSRT. I have exactly 6" from the leaf spring to the rotor mounting base. I would probably have to run a 1" spacer to get the tire away from the spring. I believe a 42mm offset turns out to be 5.9" just shy of 6" offset. Not sure what I got for room in the front. I would have to put on the new POL disk brake conversion kit with the tubular a arms to figure that one out. Question is do I do a modern or classic look? Its just a fun street car project so I really could go either way with it and Ill be happy just wanted to get a few opinions. With a 225/45/19 tire that is right at 27" which is about the same as a 255/60/15. But for the front I am not so sure it would work. I do have the PST 1.03 torsion bars I could crank up but that is a lot of circumference for the wheel well to swallow.