Engine/ Trans Combo?

Hello all. I have a couple of engine / transmission questions. I have a 360 with a casting code of 4006830-360-10. I see that it is a 1971-89. I also have a 4 speed manual trans overdrive that came from a 83 dodge van.

1. What transmission is this or what code am I looking for to find out.

2. Will this combination of motor/ transmission work together?

3. Is there any reason not to use this combination in my 64 Dart? Trying for around 400 HP.

4. What is the bell housing I will need for this combo if compatible?