also
u can quick check if coil is firing. Lightly clamp/ground a good spark plug
remove coil lead from cap center and rig/put it on plug... then crank, look for spark
points gap, or is distributor electronic ?
After cranking with no start, remove plug to see if any fuel on electrode
If truck sat for long, fuel may be stale or carb funky. Pour in 2 caps of fresh gas. See if it runs for a sec
if you have spark and fuel, then it's onto timing