I'm away at work for 5 more days, I'll try and remember to measure and get back to you. I'm guessing you'll need the 2.5", although I left the upper strut spacers off, so I probably didn't get the full 2.5" level in the front. I highly recommend these tires and setup. I love the looks and the improved traction. I live in AK so I do a lot of winter driving obviously. I work in the oilfield at the north slope of AK and most of our F250's up here run these tires for good reason.
No I haven't really noticed any stiffer ride, maybe slightly but not too noticeable. It amazes me the height of the truck now just from 2.5", hoping in the truck, sitting in the truck. I love it
Wrangler Duratracs 275/65/20 2.5 RC leveling kit installed. Very slight rubbing, trimmed a few inches off one corner of the wheel liner and it no longer rubs.
I just installed RC 2.5" on 2014 silverado z71 and put 275/65/20 goodyear wrangler duratracs on. I think they are 34.2" tall. I love the look and setup. I rounded off the wheel well liners slightly with a coping saw and no more rubbing. In these pictures I didn't have the rear block installed yet.
No I dont have any pictures and wont be home for awhile. But I ran the single for about a week before i put the 2nd one on and there is considerable more light. I expected barely any light spread or distance being behind that z71 grill but i was amazed how much actually gets through. Best 200$ i've ever spent on truck upgrades. Itll prob be a month but i'll try to take some pictures.
Here is an AC Auto 32" led light bar i got off amazon for 90$ that's turned out great behind my 2014 silverado ltz grill. There's not much of an opening in the grill space of the ltz like some of the other models but i was pleasantly surprised how much light it puts out. I have another light bar on the way and i might try to double stack another. Easy install. Just bolted right to the V frame and the light bar just rest against my grill.