A few 833's on craigslist. Maybe they are your missing 4 speed's

[BeepBeepRR]

This is the guys number. I will change a few numbers to the words. Its not an Atlanta area number.

• (35two) two16-twotwo73

I will post each link and the vin pic for each one. This one says 18 spline Hemi 833

1970+74 mopar hemi 18 spline 833 transmission - $2,250 (Ashville)

https://atlanta.craigslist.org/sat/wto/d/cumming-mopar-hemi-18-spline-833/7428093264.html

Here is another but uses the same pictures. also includes pistol grip and mechanicals. says 18 and 23 spline. So apparently you have your choice.

Mopar 4 speed transmission 18 and 23 spline - $1,200 (Alanta)

https://atlanta.craigslist.org/sat/pts/d/cumming-mopar-speed-transmission-18-and/7429599234.html

I assume this is the 23 spline. No numbers on the pad.

3rd advertisement says A-body 4speed but shows the same pictures.

1969 mopar A body 833 4 speed rebuilt guaranteed - $1,400 (Alanta)

https://atlanta.craigslist.org/sat/pts/d/atlanta-1969-mopar-body-speed-rebuilt/7435710972.html

Another advert different pictures. Says 70 to 80 4 speed manual overdrive.
There is a number on the pad but hard to read.

70 to 80 mopar 4 speed manual overdrive - $1,200 (Alanta)
https://atlanta.craigslist.org/sat/pts/d/atlanta-70-to-80-mopar-speed-manual/7418898297.html

And another
67-70 mopar 833 4 speed rebuilt guaranteed - $1,200
https://atlanta.craigslist.org/sat/pts/d/atlanta-mopar-speed-rebuilt-guaranteed/7418896981.html

 

[Purepony]

Too bad it’s in Atlanta

 

[BeepBeepRR]

I think they are actually in South Carolina. By the number they gave.