Tires: They work...Tires: Might not work...

I was going to say that if they have adequate clearance & you like them, then run 'em. But I have checked a bit & what I've seen says that size tire should be on a minimum of a 6" wide rim. The same goes for a 225/70. You might be able to get away with the smaller rim, but there's a good chance your tires won't wear evenly. I'd expect them to wear out in the middle of the tread. You might be able to compensate a bit by running a lower air pressure, but I don't know that I'd recommend it.

Having said that, I think the tire you have on back of your car looks good. I like the way it seems to hug the outer fenderwell without rubbing. Can you post pics of how close it is to the outer fender? How close is "adequate?" I'm playing with what the largest tire I can fit in the back wheelwell would be. It would be nice to know what kinds of clearances people have used with no cleaarance problems on the early Barracudas. I THINK I might be able to squeeze a 265/60 15 or a 265/50 15 in there.