it would definitely be an unusual combination... 4w3 is generally artsy, dramatic, colorful. the main issue that 4s have is being self-conscious to the point of interpreting their emotional changes as a major component of their true Self - and cultivating certain emotions to encourage a certain more-stable Self. 3's main issue is in choosing a certain idealized image to project outwardly, with the goal of pleasing others. thus 4w3 is a person who struggles deeply with identity - who they are and who they want others to see them as. and then we have INTP... positive and neg traits, let's see...
positive:
- highly individualistic (I + 4)
- imaginative (N + 4)
- introspective (I + 4)
- both logical and emotional (T + 4)
- some degree of productivity (3 + T)
negative:
- turbulent ( P + 4)
- highly internally conflicted (T + 4 + 3)
- withdrawn (I + 4)
i don't want to say an INTP can't be a 4 (especially 4w3), but it is fairly unlikely because INTPs are Ti dominant, and therefore their primary thinking process rejects the usage of emotion as a basis for judgment - whereas 4 struggles to not base their self-concept on emotion alone.