i'm trying to fix the wiring in my 4x4 and i want to know if i have fuses missing since i dont ahve dash lights but my tach lights up can someone give me a link or something to a diagram to a 1979 gmc fuse block i have no ac or cleanece lights either. oh yea and how to i find a gear ratio for my 4x4 can i look at my vin a it will show me?? or something dana 44 front axle and a 12 bolt in the rear. 4x4 works can someone tell me please plan on getting a 14 bolt rear end