Hey hopefully someone can help me out with this. I am working on my 1991 Blazer which has a 5.7 350 with TBI. I was wondering what the timing needs to be set at and anyone know were to look for the wire to unplug. Had a buddy (onlychevy6) check the timing with his gun and showed my timing being at 12*. Thanks for any help you can offer... Ialso posted this in the garage.