the easiest way... valve and timing adjustments doesnt mean itll work right though
check for vacuum leaks
no
The engine itself creates Vacuum once it is running.
84 has a vacuum advance 89 has an electronic advance Thats the only diff.
fuel presurre
17-21
a vacuum leak.
Air intake leak between the carb and the pistons action. the closer the the carb, the more likely.
Check all vacuum lines.
19 to 21 inches at an idle.
where can i find a vaccum diagram for a 1985 Chevy truck with a 350 small block
more than likely you have a leaking vacuum line. some of those lines are really thin, and the smallest puncture will cause a loss of vacuum.