35s are easy to put on a TJ on 4" of lift. Do you have a BL at all? My old TJ had a 3.5" RE lift and 1.25BL and could have easily fit 35s and that was my plan once the 33s were worn out. Sounds like you got a great deal getting 35s for the price of 33s. The only downside will be the gearing with only having 3.73s. I can't remember what you've done to your D35. Is it beefed up to a Super 35 now? If not, you're going to be dancing a thin line on when it will break with 35s.