155805

My starting point was clue 4. Since I knew the sum has to be 14 and from clue 3 the difference had to be 5. I started using random numbers.
For example: 626 but the difference here is 4.
Then I used 8 and 8-5=3. So far my numbers were 3 and 8. 3+8=11 and I need 14 so I just added 3. At the end my numbers were 383.

I’ve checked 383 with all the clues and it matches them all.