Rebuilt Slant 6 but No Spark help!

OK the points are simply a switch, BUT there's some "tricks."

First, suspect the high tension coil wire itself. One way to check is turn key to "run" use a grounded screwdriver (clip lead) and hold that close to the top of the coil tower. With your free hand, jumper the starter relay large exposed studs with a second screwdriver to crank the engine. This test eliminates the coil wire as a problem.

Next.......on to the distributor

1...Make sure the points are actually closing and conducting current.

2..Make sure that when the points open they are actually stopping current

"Caveats" in this mix include an open or shorted condenser, bad/ open or shorted distributor primary wire, points that are so corroded, that when closed they don't actually carry current

TO CHECK all this, put a test lamp or voltmeter on the coil NEG which SHOULD be leading to the distributor

"Bump" the engine until points are open. With key "in run" there should be battery voltage on coil NEG

"Bump" the engine until points are closed. Now, voltage and coil NEG should be VERY low, perhaps 1/2 volt, the lower the better.

Next with points CLOSED and having confirmed that coil voltage is LOW, move your meter to the coil POS. Now, coil voltage (coming through the ballast) will be LESS than battery, perhaps 7--10V. If much lower, you have a bad ballast, / bad connection in the "ignition run" power circuit. If much higher, someone bypassed the ballest

If these two voltages check out, replace the condenser. if that does not give you spark, replace the coil

+++++++++++++++++++++++++++++

If the coil voltage tests do NOT seem right, you likely have problems right there in the distributor. The dist primary wire can be broken inside, opening the circuit, it can be frayed, causing a ground short.

The points can have a problem where the insulator is damaged and grounding the connection, or they points can be corroded and never conduction.

If the condenser is either open or shorted, there will be not spark. An open condenser sometimes gives a very weak spark.