You don't want either of those tires. Trust me, 275/60/15 (the size I have on now, and the size in my car's sig pic) definitely has the perfect height for these cars, but the width just isn't there. My next tires will be 325/50/15, now there's a ballsy tire! They have the same overall diameter as those 275's but at least have an aggressive amount of width to them. At this diameter tire size, I have as much room as I need to extend the tires outwards, just got to watch the backspacing and quite probably throw an offset kit at the leaf springs to get the 325's to clear. Here's a thread from a while ago, with some nice pics:

https://board.moparts.org/ubbthreads/show...rue#Post4592036