Well, I consider myself fairly mechanically inclined, but I may have overestimated myself. More accurately, I did not use the right tool for the job.
The two nuts you have to remove to drop the tank were pretty tough on my truck. It seems like there is locktite (or equivalent) down the entire 3 plus inch bolts. I only have a 3/8" drive socket set which left me with a deep socket that was not quite deep enough. It also seriously compromised my leverage. 1/2" drive ratchets tend to be quite a bit longer.
The wratchet slipped, my hand hit the metal shield on the side of the tank. A 1" gash and 5 stitches later, my truck was laid up and I couldn't put it back together with a bum hand.
This all happened Saturday evening. Today I got the vent kit installed with the help of a local shop.
The vent kit installation really is simple and went exactly like the instructions say. For me, it just wasn't what I'd call "easy".
There were at least 3 or 4 gallons in the tank when we put the kit in. I drove 1 mile to the truck stop and put 35. 5 gallons in it. This short-bed's 34 gallon tank is now scaring the heck out of 40 gallons.
Bob