Lahrz, you may want to go with at least a 50 series tire. The 60 series will be too tall & being 245 wide you'll have some rub issues...
Unless you stick the rear un in the air a bit...

With a shorter profile, (50's) you should be able to pull it off. I have 225/60/15's on Rally II's on my 67 and they are just fine front and back, but want to go wider in back next time I need tires... and I'm looking at 245/50's...

So let us know how it goes!

Brett - 67 Drop Top 455! (Car 229 in the car show)