Unexplainable Transmission Stutter... help?

TrailBeast said
That's an engine miss, and something loose under the car rattling because of the engine shaking from the miss.

Verify (probably again) your firing order (wires in the right order)
Make sure no plug wires are burned on headers.
No plugs are cracked from the work done. (this is kinda easy to do)
Get under it and bang on things with your fist.
(mufflers can come loose inside)

Why would an engine miss cause the car to not shift from first to second, or even go forward really but be totally fine driving in reverse? Also I can adjust the linkage all the way out, rev the engine and have no problem?

Then if misfire why can I rev the snot out of the car in neutral and it doesn't misfire and timing stays perfect to where it was set to?

Distributor- correct firing order
Wires- all good and none burned
Spark plugs- pictures posted. A little dark, these are the NgK plugs so they run hotter than the champions. I may get some champions just to change them out anyways.