Installing and correctly setting a vortec distributor

[shaneroze]

One of the odder things messing with a distributor I've noticed that if I have if I have it set on #1 a tooth counter clockwise my truck gets hella more power and mileage but dreaded check engine light from the P1345. Set it back forward to the right tooth for the light to go out but I'm like, man, I may just run it and pull the check engine light out.