1995 Chevy Truck Wont start

Hello, I know that each shim must be evenly replaced, try bring it in all the way, use grease or any dye to look at the engagement pattern, it is not pulling in and holding for a reason, there should be the same shim on each side, or no shims necessary, as long as the cable and wiring is able to allow enough juice to keep it turning, how does the engine turn by hand, use a long 1/2 inch drive or grab the belts to see if its the tight engine that is causing all the problems. Its the weather, cold makes it so much more difficult to turn, I know the feeling.