What people can fit varies quite a bit with the quigleys. So what info you get might not be the case with your particular van.
I’ve lifted mine in the front with the moog c880s springs. Gave me roughly 1.5-2” of lift. I put on 35’s and the tires rub on the control arms at full lock and just barely hit the front bumper in the lower corners. A small pie cut on the bumper on each lower corner going from a 1/2” to nothing about 3/4 of the way to the top stopped all rubbing, but there’s numerous others on the forum that had to trim a pinch weld on the back of the wheel well to keep from rubbing with 35’s.
If it were me I’d head to a tire dealer your in good with and tell them what you want. It can consume some time to try different sizes, but if they want your money, they will accommodate you till you find what works with your van.
"understeer is when you hit the wall with the front of your car, oversteer is when you hit the wall with the rear of your car, horsepower is how hard your car hits the wall, and torque is how far your car moves the wall."