No spark on my 84 Ram.

You may well have a concern. Rustle up a wiring diagram, and measure cranking voltage at the bulkhead "going into" the cab on the line feeding the ign switch, then check it on the wire leading to the resistor bypass AT THE COLUMN connector and see how those two look. If the column reading is somewhat lower than the first, then work back from there. If the ballast is somewhat lower than the column reading, then work between those two

What does it read (cranking) at the battery, starter relay?

I'd say what you have sounds pretty low