360 LA to Magnum swap, How hard is it?

Thanks, for the responses guys

Here are some specs on the engine in question:
- 99 360 magnum block
- Diamond racing pistons (51021)
- comp cams XR286-HR10 (not sure this would work with my 3.23 gears and mild stall)
- Edelbrock aluminum heads (61779)
- comp cams roller lifters (8920-16)
- Edelbrock intake (7577)
- Milodon oil pan (30940)

This combo would probably work best with headers, high (2600) stall and steeper gears (3.91) correct? or do you guys think it would do okay with the stock manifolds, mild stall (not sure probably around 2000-2200) and 3.23 gears?