In an effort to settle a disagreement between a friend and I, please answer some questions about the Chevy K5 Blazers and Chevy pick-up trucks used as military vehicles. These questions are for the military vehicle versions only. You can add any info you think is worth mentioning also. Thanks. What was the first and last year for the K5? What was the first and last year for the truck? Did the K5 ever come with a D60/14 bolt? Did the trucks ever come with 6 lug axles? Did the truck ever come with a 10 bolt front? Did all 14 bolt FF axles have 4.56 gears and a Detroit Locker? Do the 14 bolts use the 1 ton spring spacing?