It’s a good idea, but you have 2 issues you’re going to run into.
First, there’s only so much room in the cab of a C class m/h, whatever is behind the drivers seat will limit how far back you can go and the headroom is limited compared to a class A unit. In mine the dinette is behind the drivers seat and Winnie (Itasca) designed it such that I can move the cushions lean the front part backwards and allow me to slide the drivers seat all the way back and recline some, this makes a huge difference.
The second problem will be availablity of a seat the right size, height of pedestal, etc., to fit a van chassis. If you’re rig has OEM seats check some of the RV wreckers for upgraded (Flexsteel?) seats.