I believe 4.88 Yukon gears are now available for the SLA D35 front-end. Most people regear to 4.56 for 35s, but I know a guy with the 4.0L and 4.10s running 35x12.50s who is perfectly happy.
4.88 sounds tooooo steep to me, and 4.10s is a little too light. I'd say go 4.56. Buy the gears and install kits from the internet (if you are a TRS member you get discounts at Randy's Ring and Pinion) then find a local trustworthy shop to install them for you. Look at paying 300 or so for the gears (front and rear) and probably 250 per axle in labor.
2000 Ford Ranger XLT
4x4 on 33s
United States Army Infantry