Lost reverse on 65 dart gt

My 65 Dart GT with /Six has lost reverse in addition to no longer starting unless I jump the Neutral Safety switch with a ground wire.

Drove great to/from work. Parked it in my garage. 5 days later no start and after the neutral switch jump cure no reverse - still has forward gears.

Assume this is a 904 transmission.

Kickdown is not currently hooked up after switch to 4 Barrel. Figured I could just shift manually. Hope this is not the cause.

Linkage seems to move as expected. Plastic coating on transmission has melted some due to proximity to exhaust pipe - internal wire seems OK.

Any ideas?

A source for a NOS or replacement transmission cable is desired if anyone has recommendations.

Hate having the Dart off the road in this nice East coast weather.

Thanks