Keep wrenching, you'll get it done. When installing the pushrods after you tighten each shaft down rotate the engine to check for binding. I was sure everything was perfect yet twice I had something wrong, Not a hard job, just tedious.

After I installed the 3.91 cradle I had a horrible drone. Found a 2018 Challenger factory cat back system and installed it. Cut the active exhaust valves out .Little bit bigger tubing, no drone and very nice sound with the cats gone.