It will rub bad with the 12 wides, I’d drop down to a 33 if that’s the route you want to go. 305/55 looks good with a 20x12. And it will probably still rub a lot with any kind of flex off-road with a 35 even after trimming for street use.
I also don’t think I’d want to do much actual off-roading with that size wheel, the lips are going to get beat to death because there just isn’t enough sidewall or “bulge”.
I think you will be happier with the 10 wides, but you could make it work with some cutting if you really want the 12 wides.
You can kind of tell from here, this truck is at 7”. So visualize being 3” lower on that size tire (which this is actually probably 1/2” shorter than most 35s as well)
My truck still rubs a touch on the -51 wheels, but I’ve not trimmed anything on the actual truck body.
Edit: forgot this was a rebel, so you will be at 5” if you are doing the basic kit. That will def help some, so 2” lower that this one.