I searched around - but I lack skills with keyword search.

What are the hoses that are most likely to go? I'm on a quest to gut the 80's out of my T2, and I'm not sure what hoses to start with and which ones might never need to be changed. All this started because of my car having an idle vacuum leak - so I figured I might as well go and try to change out all the hoses while I was hunting down my cause. I've swapped all the needed ones like radiator etc but I guess now I'm trying to find the odd ones that like to blow up as well.

 

All of the vac hoses swap out with sillycone. Swap out rad hoses from heater core, etc.. Just swap out anything that feels stiff, put it that way.