Let\'s play: \"Do I have a Gov-loc?\" That is the question of the evening! How do I go about looking to see if I have a gov-loc in my 12-bolt? Also, could I get some history and information as to what this so called thing is? Thanks! 1977 Blazer w/ 350 GM crate motor 44 front/ 12-bolt rear, gear driven NP205 31x10.50r15 BFG All-terrain- Larger on the way!