Simple answer- Don't use the hi-lift
Trying to lift from the center of either end will result in it getting the wheels off the ground, then the truck shifting to one side or the other, knocking it off the jack.. possibly injuring someone beneath it..
a VERY experienced wheeler that I had do some welds on the stronger parts of my bumper recommended an all-in-one bottle jack/jack stand. He said they are about $30 at tractor supply, go up to about 18-24 inches I think, and keep you safe...not making you have to carry two jacks.
The nice thing to have a hilift for is the tugging capabilities, and if someone doesn't carry a jack with them and CAN use a hilift, you're prepared!