Thanks all for the great advice.
Yes, I use
https://tiresize.com/calculator/ for the width and wheel choices already, and it is a really great resource.
So, ref, when you say 315's do you mean 315/75r16's? checking those on tiresize.com and those look great. They end up being 34.6" compared to my existing 32.8
So do you think I would need to modify something to run those?
I just replaced the control arms and I'm not sure I want to screw around with moving axles and such. I don't care if I need to trim a valence or bend a little sheet metal out of the way though.
If I did 295/75r16, they come out to 33.4, not noticeably different than what i have. It seems like 305's are somewhat rare .