Are you sure your harness has not been messed with? I would just take a look at the wire's for the injectors make sure if they were cut and spliced that it was done right. The harness can look new but be used.

Bottom line if that cylinder is missing out. Its gotta be plugs,dizzy,wireing, clogged injector, spark plug wire's.(I would say try a diff TPS or MAP cuz mine runs all fucked up when I had a bad TPS i donno if that has anything todo with it) Other than that have you checked the compression on cylinder 1 compared to the others? And its not running in LIMP mode is it?
But I would try another dizzy, I have heard of bad refurbished dizzys. Thats all I got tho... after all that I would just call Neal and have him come out and be done with it.813 842 5517

GL!!