I've got 295/55R15 Mickey Thompson Street ETs on my 15" x 10" steel wheels with 5.5" backspacing. My car's a '68, but I doubt that a '69 is much different. There's sometimes a little rubbing if I turn corners too quickly, but other than that, I haven't had any issues.
"When I'm in a slump, I comfort myself by saying if I believe in dinosaurs, then somewhere, they must be believing in me. And if they believe in me, then I can believe in me." - Mookie Wilson
