[72 cheyenne pdx]

Here is the list of things I do for a tune up.

plugs
wires
cap
rotor
condenser
if still running points, adjust them or replace
check belts, replace if needed
fuel filter(s)
check air cleaner, replace if needed
oil change (if with in the limits)
check diff, trans, brakes, coolant

You may have a weak spark. You may want to check the coil as well. My truck was doing the same thing, plus a starter issue.