Slant 6 wont start

I'm not a "slant six" man but THIS SMACKS OF TIMING

Before you change ANYTHING,

Pull the distributor cap. Move the front pulley/ balancer back and forth to "feel the slack" and move it until the rotor just starts to turn, and NOTE how far the balancer moved. This will give you some idea of slack in the chain

Bring the timing marks up to "where you think" you want the timing, I.E. say, 5-8 BTC, If the rotor is NOT pointing close to the no1 plug wire tower, rotate the crank ONE turn, and bring the marks back up where you had 'em.

If things don't look right, wrench the engine until the rotor IS APPROACHING the no1 tower, AND either the points barely opened, or the pickup coil/ reluctor are aligned in the center

NOW LOOK to see where the timing marks are. If they are a "ways past" the timing has changed, IE the distributor drive gear or the timing chain has failed



NOW PULL THE DISTRIBUTOR and inspect the drive gear. as well as use a flashlight and inspect the cam gear.