Won't Start need advice, Please read....

It's easy to jump to conclusions. This is a 65? It does / does not have original breaker points ignition? Converted to Pertronix? Or Mopar breakerless?

"Color of spark." Easy to get led off the trail here BECAUSE of resistor plug wires, which often turn a nice blue spark at the coil, to a perfectly acceptable yellow spark at the plugs.

Therefore CHECK the spark right at the coil. HOW? You MUST crank the engine USING THE KEY. This is because of the coil resistor (ballast) bypass circuit. "Rig" a test gap right at the coil and see what you have there. Should be a nice pop, blue spark, at least 3/8" long, typically more. Use WIRE to check, not resistance (radio supression) wire

Examine the cap and rotor for moisture, other deposits, debri, metallic, etc and DAMAGE. Pull the rotor and examine it and the cap for CARBON tracking

We've already mentioned wet, oil fouled plugs.

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I would check compression "just because." Does the starter "sound" normal? Often you can tell if an engine is down on compression just by listening.

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Carb......maybe it's "completely flooding." That is, maybe needle / seat stuck open or has dirt and is flooding engine with fuel. Again.......check the plugs carefully. If you have a rubber fuel line connector, try disconnecting the fuel line and plugging it off. You should be able to see fuel flooding over into the carb. Look down the throat with a light, and crank the engine. You can do this easily by jumpering a screwdriver across the two largest exposed terminals on your starter relay. BE SURE!!!! it is "out of gear" before doing so.