Welcome back:
I wish I could give you a good answer related to the engine change. I will tell you that the vehicle was never set up for a diesel so everything would need changed. It seems like it would be more trouble than it is worth.
What do you mean the vacuum hoses are all blank? Can you see where vacuum hoses were once located?
As far as the data link connector, it's located just above the hood release handle. See picture 1.
Let me know if this helps.
Image (Click to make bigger)
Wednesday, May 29th, 2019 AT 4:27 PM