slant 6 auto(904) to 4 speed help

Ok guys I have a 833 4 speed that I would like to go ahead and put behind my slant 6. My car is a 70 duster and I wanted to know what bellhousing to use? Ive looked up some info but as soon as I think I have it right I find something to throw me off. Here is some info on my trans if it helps.


Number read- 1b336822 833 3378 0131


I know I need the pedal and tunnel hump to weld in.

Thank guys.