Hello all, I am the new owner of a '88 10AE. As its sat for close to 20 years now im looking to replace almost all wearables including the vacuum lines. Which ones do I absolutely need? I've read the write up on removing emissions equipment but I plan on tastefully modifying the vehicle to a more modern standard so which lines are crucial for engine operation?

 

all of them. there aren't actually that many, and there are check valves so most of them only see vacuum.

actually if you don't need to take it apart its best to leave it alone.

you do want to check all the valves and stuff to make sure they actually work though