Ok, tonight i was gonna take my first drive in the car with the new 496", its a 10-1 motor, well, i changed the rotor and cap on the dist, because it was used and needed to be replaced. after doing so, i made sure everything was back in time, and started to fire it up, when i did so the engine kicked back on the starter and broke a tooth, i retarted the timing a little more and tried again, everytime it would start to fire, it would hit the missing tooth stop for a second and blow back up through the carb, then it got worse and now im missing about 15 teeth on my flexplate.... what caused the intial problem? i realize the timing was a little high, but i dont understand why when it gets t a broke tooth its blowing back up through the carb. and the starter is shimmed correctly, its not to deep or shallow, its breaking the teeth off approx 2/3 down the tooth

also the motor has about 30-40 minutes of break in time, started off with 150 psi cylinder pressure, its upto 165, but i still have a lot of blowby through the crank case breather, it hasnt ran under any load, approx how many hours before the blowby goes away?

 

Depends on what rings you have, some seat quick when they are iron and even faster with the break in lube in the oil pan, but molly take a bit longer and plasma from what i hear takes even longer.

Dont know what to tell you about the teeth breaking...