It all depend on the type of terrain you're looking at getting into. You SHOULD be able to fit 35's with 4 inches. but I'd put more because like obstacle that need a little flex. And I don't think you'd have enough room to flex with ONLY the 4 inches...
4" of lift and 35"s wil rub if flexed even a little. The rear wheel well opening will rub. The opening isn't 35" at the bottom. I have 3 1/2" backpacing on my wheels and NT axles (78) and I rub the inner wheel well part of the tub in the rear and the frame where the steering box mount is in the front at full lock and flex. I bent my fenders with 33" Baja Claws with the same lift. I removed my fenders and cut the rear wheel well opening out to clear my 35"s.
1980 CJ 7--3" Black Diamond, 1" body, locked both ends, 4.56, 35x12.50x15 SS LTB, "family" cage
I have widetracks and After market procomp black wagon wheels..i not to worried about the width just the height. I have 11.50s on there now and they wont rub a bit and there is at full flex plenty of room.
I had the Baja Claws on my 86 CJ with 4 inches of lift. They did not rub on the street and I never wheeled it. I have some pics if you email me I'll send them to you. NoNeck@NoNEcksChevelle.com I LOVED my BAJA CLAWS! They looked awesome and were actually very quiet on the street and rode nice. Sold the Jeep before I got a lot of miles on the tires and again I never wheeled it,. but I would not hesitate to buy the tires again. I am now running Kumho MT 33's with advertised 4 inch lift which ended up netting me 6 inches.