Not sure if you are getting stuck trying to pull the rope through, or if you have the rope through and are trying to pull the new cable but I guess it only matters if you are stuck once or possibly twice.

Also, don't know how big around the rope is and how you have it connected to the cable. smaller diameter is better and making as smooth a tape job as possible could help. For that distance I would have pulled a wire fish through. That way I could push and pull. Let's assume that nothing could help and you had to get to it, are there any hatches with storage areas along the way? I know its a hassle to remove one, but you could end up spending less time doing that and getting right to the problem then to keep banging your head on it. Avoid live wells if possible, but even that would be a possibility. Its just more disassembly.