I'm buying new wheels and tires. My frame (isn't notched). I'd like to put a 305 on the rear. I've seen other post saying they have 305's on the rear but never post what the backspace or offset is. Did some research and so far I've found for a 295 to 305 the backspace is 4.5" on a 10" wheel. Anyone have any experience with this or have 295 or 305's on their car ? if so what wheels and specs. Any help would be appreciated.