That was IMPALADAKID, who has now sold the car, but pictures and details remain. He had Futura (i.e. Pep Boy's brand) 275-60-15's on his, and they looked great. Not sure if he had to modify the rear skirts, but with my 17" 275's I had too--and they're pretty tight.
Most all 275/50R15 tires are not rated for 7" width wheels. The lowest rating I've seen is for 7.5" width wheels. I know, , I'm just saying... Often you give up things like warranty, service plans, and some shops refuse to install when you use tires that are not rated for the application. Might be a good idea to read the fine print if you go that way, if you mind it.
Don't you need 275/60R15 to keep the stock diameter and avoid speedometer error? More sizes brands carry it, it's cheaper, and you're safely within the minimum wheel width. They should fit, anyone have them and know for certain?
I just researched a bunch before I bought tires. I know 275/60/15 sizes all recommend an 8" wheel. You can see the size difference between a 255/60/15 and a 275/60/15 in the post below.
It's on a Caprice, but it gives you an idea of how much bigger the 275's are. here
Im just bought two BFGoodrich 275-60-15 Street legal drag radials im going to run on the rear as a daily driver rear tire. They better fit. Im going to get some wider tires for the front. Im trying to keep my car looking stock/stealthy, only give away is exhaust/tips.