69 340 timing chain questions - help!!

Good to hear you may have it wipped George. Just thought I'd say I once had a rebuilt points distributors in a 383 that didn't run right. I checked the points and found them set at .007' so I reset them at .018" and started it up. Didn't run any different. Pulled the cap and rechecked and found the points at .007" again so I'm thinking how did they slip?? I had the screw tight!! So I reset them again and had a buddy spin the engine over and I watched them and rechecked them again and once again they were real tight. That's when it hit me. Possible bent shaft. I had my bud tap the starter over half way around and sure enough the setting was right there. Pulled the dist and spun the shaft by hand and could see that it was bent. Put in a new dist. and it ran perfect. If I would have known you had a rebuilt dist. in it I'd have mentioned checking that.