I'm getting ready to replace the upper and lower intake gaskets on my 2001 3.0L due to a suspected vacuum leak and had a few questions. What other sensors or parts should also be changed when everything is off? At 135,000mi all that has been done that i'm sure of is a couple front coils, and the pcv rubber line. I do have a new coils in the garage so maybe I'll change the back ones. Any special instructions or tips for the gaskets? I didn't find any write-ups when I searched. Thanks