From the website linked above.......

"This modification allows you to use the air space designed into the tank to allow for fuel expansion. If you fill your truck with fuel until you can see fuel in the filler neck on a hot summer day and then park your truck in the sun, there will be no place for the expanding fuel to go. This may cause fuel to leak. Use common sense when you fill your truck to the fill neck."

Taking off my box next week to straighten out the front of it. Darn skid got away on me! 8*(

This mod and putting the filter on the 2 open vents on the top of the tank will get done then. May just "Line X" the box instead of putting the box liner back in again.

Skinner.

 

Where do I go to read daves tank mod and grate instruction?

 

http://www.innertruck.com/ventkitinstructions/

I just got this kit from Dave last week. Gotta go for a drive to get the fuel level down so I can install