I just looked at the paperwork that came with mine and don't see the torque, but tomorrow Titan will be open and I have found them to be very forthcoming and helpful with info.
Not sure exactly what truck you have, but once you got the tank strapped in place, were you happy with the space between the rear fuel filter and the side of the tank? On mine when the installation was finished the tank and filter were touching. I believe they could have loosened the straps a bit and moved the tank a quarter inch or so but instead they loosened the bracket holding the fuel filter and made space that way. I did not want them rubbing on each other. Also wanted to make sure the filter housing was OK for filter changes.
Lol, there was zero clearance between the filter for myself as well. Also, the tank will also contact the DEF fill tube if you don't line everything up. Since you have to "reshape" the straps, it will try and pull the tank in the wrong direction when you first tighten everything down.
This is what I did:
1 - Tighten the straps to allow them to take an initial shape.
2- Loosened straps again and physically moved tank aft to clear DEF tube. Inserted small plastic shim between tank and filter housing.
3- Tightened both straps down while checking the clearance.
The filter housing now has an 1/8" space and the DEF tube is free.
I added some extra zip tie cables to the DEF tubing and the fuel line. I didn't like them just flopping around as they would probably wear a hole over time. I would have liked to see a plastic bracket for the pipes like the OEM tank had.