if you follow the 1969 service manual you can't put a 245 on the back on any rim.
Yes they fit,i too have run them.Should you ..maybe not.
You are all correct..Now everybody hug and move to the next post!
Thats whats on mine. I would LOVE to run it on a 7" wide wheel...if i had one with the small bolt pattern.. still watchin the for sale ads for a decent small bolt set that affordable..