Auto to manual conversion

You need a special shifter handle to sneak thru the console in the right place. But the 4-speed console is just a lil different, to accommodate the hump.Yes your auto console can be converted.
Somewhere in my back shed, I think I might have everything for one more swap, except the hump, and Back-up harness. I might, I say;might, even have a M/T console.
If you have buckets, you might consider moving the shifter back, closer to your body, and raise it up some. This is best done with a B/E long tail. But the stick will no longer fit in the factory console. No worries the factory stick is way too long anyway. Back in the day, that was usually the first thing that got ditched. I did this to mine and I love no longer having to stretch to make the 2-3 shift. Plus I can really smash the 2-3 now, without thinking about leaving knuckle-imprints on the dash.
Your A904 driveshaft will not work with a Regular A833. But it will work with a slanty A833-od, which has the smaller output shaft.
As far as swaps go, this is one of the easiest things to do. I've done several.

If yur looking to bang gears, be advised that this will likely not happen with your 318 unless you short shift it big-time.
For instance, with a 5000 rpm shift-speed, 27" tires, your 1-2 shift occurs at:
55 mph with 2.76s
47 with 3.23s
43 with 3.55s
39 with 3.91s
But short shifting at say 4000, then your shifts will be at ;
with 2.76s; 44/63/86
with 3.23s; 37/52/73
with 3.55s; 34/48/67
with 3.91s; 31/43/61
No matter how you slice it, until you get into 4-Series gears, around town, you will, for the most part, be using First and Second, occasionally Third.
Lo-compression 318s like 4.10/4.30s (nope I got none left,lol.)
Don't get me wrong, I've been running Mopar Manuals almost continuously since 1970, and I have big fun with them. But I used to run exactly that, namely 4.10s or bigger.