I have a 1990 e350 quigley with dual wheels. I use it to tow a small 5000lb trailer all around the country. When its not being used for towing it will be my expo rig. Tire on it now are 215/85/16 need to be replaced yesterday. I want to go with larger tires like 235/85/16 or maybe be bigger. Longterm I wanted to do a srw conversion but not sure I have enough time to figure that out right now. Any suggestions on what tires or any sure thing srw conversion that can be accomplished without problems. I seen a few ambulances running H1 rims. Not sure If I have enough room for h1 rims and tires. Any help would be great