1969 Roadrunner front wheels

[69roadrunner383]

There's a lot of information for the rear wheels, I have found the answer for that. But what is the biggest Wheel and Tire you can run on the front of a 69 Roadrunner. With stock suspension, and factory drum brakes ? Please provide wheel size, tire size and backspacing. Thank you for any help.

 

[Russ69Runner]

went with 7 inch width 4 and quarter back spacing 15 inch rim's.