What parts are necessary for this swap ??
I have a bell housing that will work.
What about all the clutch parts will stock ones work ??

YES. bone stock clutch parts work just fine.

it depends on what your stock tranny was. my old t176 used a different spline count than the np435. all that is required is that the clutch disc it'self be swapped with a ford unit that matches the clutch diameter of your 258's clutch and the spline count of the np435.

I used a clutch disc out of an 85 mustang GT with a 5.0 on mine! It was a little tight at first, due to the thickness of the disc, but after it was run down the road a little bit, it was fine.