Not sure about a ‘69, but that tire size just won’t fit inside the wheel well on a ‘67 or ‘68 on rims with a standard setback. I have the same size on ‘68 on Crager SS’s. I think they have a 4.25 or 4.5” Setback, and they rub without help from air shocks. I have fresh +2” multi leaf springs and air shocks.

I’m currently considering a set of American Racing Torque Thrust rims. They are available with a “deeper “ back spacing so those tires will tuck into the well.