I didn’t mean to throw the 3B turbo grenade and run lol.
The 3b isn’t designed for interstate speeds, let alone larger tires/lifts speeds, then slapping boost on top of that.
It’s a plodding tractor engine. attempts to make the 3B a highway speed roller tend to end in bad things. Dropped pre-cups, head gaskets, cranks, bearings etc.
My 13bt was a factory designed turbo engine. On heavy 34” tires I can cruise 65mph at 2300rpm and very safe egt at 5000’. Once I try to start pushing 70 plus, egt start to rise and it feels like im working it a bit harder.
Intercooling can definitely help, but on a 3B you are still fighting compression ratio and indirect injection which is pretty much a losing battle.
Not to say you can’t have it last if you take it easy, And of course it’s your rig and money.