tryin to break in new engine, ruff idle

Ok if you have had the intermediate shaft out it may be off.Yes what aar said but the gear can still be off position and if its off alittle everything will not line up right.If #1 cyclinder is at TDC and the rotor is pointing at #1 on the cap you are good to go.My brother had the same issue on his TA Challenger when I helped him break in the motor.He had intermediate shaft off position which allowed it to point close to #1.I pulled the shaft repositioned it and put it back in, and then it was dead on #1.

I don't know maybe I just have been messing with Big Blocks too many years.LOL Jim