what bolt pattern do these come with? And can they be converted if they are eight lug?? I am gettin the bug to spend a bunch on my k5 and these rear ends can be had in my area for around 400 complete. Also do they typically come with lockers? 79 4x4 k5 stock 3spd granny stock 350 12 bolt open rear 10 bolt open front Subvert the accepted paradigm.