looking to find out from any one what is the biggest tire and rim that has been placed on there 78-87 elky with out notching or fabing the body sent specs @ pics please

I'm running 16x8 S-10 Xtreme wheels with 245/50/16 tires. They fit, and fill the wheel wells perfect. Theres less than a 1/2" between the inside of the tire and wheel well in the back, and they dont stick out of the fender lips. The only part where they rub is just a tiny little bit on the front air dam, seems to be only at full turn in reverse.
http://www.michiganjeepers.com/photopost/data/500/52DSCN0819-med.JPG?5278

what is the BS and do can you send a pic of the back?

Billet Specialties GT 93 16x8". BFGoodrich g-Force T/A KD P255-50ZR16 all the way around. 4" Backspacing.

what is the BS and do can you send a pic of the back?

4.5 BS on the Xtreme wheels, and heres a rear shot. 8)
http://www.michiganjeepers.com/photopost/data/500/52DSCN0821-med.JPG?570

17x8 with a 4.5 bs all the way around. 235x40 front and 245x40 rear. When the front get worn out I'm going to move the rears to the front get something like a 265 or 275 for the back. The 235 seems too small a profile to me.

http://www.poltergeist.us/_uimages/ElkyPics/Exterior/After_Eibachs_Front.jpg

17 X 8 American Racing torq thrust II's in front with 4.00 backspace 245/45/17 BFG G-force tires.17 X 9.50 Rear Torq II's with 5.00 Backspace 275/40/17 BFG-Gforce. The tires do not rub, or stick out from the fenders. Also has 1" eibach drop springs front/rear, Koni shocks, Energy Suspension poly suspension Bushings, and body bushings,the ride is awsome! Good Luck!