Swap 10spd to 13spd

[Precisionw900]

It actually works out pretty well as is with the 18, being a gravel hauler it’s either fully loaded or empty so I stay out of the high hole most of the time or the low side of it. But empty I can roll along at 65mph at 1400 rpm and keep boost pretty low. It works well enough that I wouldn’t change it until I need to go into the rear but at that point it will probably get at least 3.55-3.73,

What ratio do you prefer with your 10 speed?