Hi again, I didn't really look into getting it repaired, I found the bottom half of a plenum for $50 and just went straight to swapping it.
As for whats in the engine, I did a coolant flush and replaced my radiator with an Aluminum one at the same time, have had no issues and it has been a good 4 months too.
If you need a quick fix, I still have the bottom half of my plenum in my shed, it has enough pipe to put a clamp on and seal with no leaks. - Freebie of course.