My 67 Catalina had clearance issues with 235-75R-15 on the front. Typically when turning tight into an uphill driveway. The wheels were RallyII's off of a 69 Bonneville.
The pic below show my 67 with the RallyII's. I think it was taken in 1992. The gold Catalina is a friends and the blue 65 was my 2+2 with a 3spd on the floor. I miss them both
Carmak
Riverside, Iowa