Biggest front tire that can be run on 1964 plymouth valiant

Probably not a 235/60/15. As per the second post please post your wheel info.

read post #3, and the rest. I think your 64 probably has tighter wheel wells yet.
Tire Size 68 Barracuda
I dont have wheels yet. Thats why i made this post

I plan using 15inch wheel vintuques dog dish rims