Ok, I have a 86 k5 (daily driver) w/ 10B front and rear. I turned my spyders (rear) into dice the other day . I can't for the life of me find a 3.42 geared rear end (junkyards). The reason I need the whole rear end is b/c the center pin was welded in, ring & pinion chewed up by spyders, and I dont know how to "set up" a rear end. I think I found a 10B (or 12B) w/ 3.73 gears, 5 lug. I can get it for free... Will my 6 lug axles swap in (10B or 12B)? Can I run it if I keep it in 2WD? This would be a temporary fix. After I get my lift and tires (35s) Im going to get 4.56 gears for f/r. I've done many searches and nothing answered my question completely. P.S. Driving your grandma's mini van back and forth to school and work is no fun. My friends > Thanks for any and all help.