1964 plymouth valiant with 225/60/15s for the front

that's closer than i'd want it, and likely to cause a logistical issue between the tire fender.

turn it out about full lock and compress the suspension and see if the tire contacts the fender anywhere-- likely it will-- then make adjustments from there: rolling lips, ride height, etc.

i had to be extra cautious when i was running 225's on my 69 cuda on entering driveways or divergent approaches. i had some rubbing in the center of the fender that i alleviated by partially rolling the lip and raising the ride height a smidge. and that was with the cavernous area of that body. so i'm guessing you're gonna be trimming somewhere.
So it doeant rub at all. But when its halfway through its turning cycle the tire comes 1/8 from the corner of the lip and when the wheel is straight it is 1 3/4 from the lip.

Would negative camber help?

I dont plan on having the car low. Looking stock height