it can be the rotor or the distributor cap and it could also be a bad electrical conection.(your "feed" wire).
could be your ignition modual
.035
0.035 inches.
It "tells" the computer the rational location of the distributor for spark timing.
.035 inch.035 inch
Follow the sparkplug wires down past the valve covers -they should be at the end of each wire
Could be 3.55 or 4.10
No.
1990 ford truck no spark
Could be a leaking fuel injector.
You could find some on Autotrader or Craigslist for about $1500,depending on the condition.
The marked # 1 position on the distributor cap faces to the FRONT / CENTER