Yes, you will be able to clear a 34" tire with a 2" BL.I am a newbie to Jeepdom and have a 2010 Wrangler Sahara (4dr). I want to upgrade to 18" rims and 34 inch tires, purely for aesthetics. If I install a 2 inch body lift with spacers, will the tires fit? Any help would be great.
2" BL is an uncommon mod on the JK, and I doubt you will find many people on forums with positive things to say about it. They are disliked because of the gaps they leave when lifting the body away from the chassis. With the 2" Body Lift on the JK, you will also have to cut some sheetmetal around the shifter (if yours is a manual), and also extent the steering shaft with a bracket. There is a video on youtube of a guy intalling one on a yellow jku. If you search for it, it might give you a better idea of the gaps, and what's involved in the install.
I would suggest a 2" coil spacer lift as mentioned above. You could also order some 1" coil spacers on the cheap off ebay or amazon and see if that will clear your tire choice. That paired with a 1" BL would work with 34's.
Lastly, you could change your fender flares and squeeze those tires in with no lift.