Some engines are fine with tossing the thermostat. Some aren't. Gutting the thermostat is the safest way to crutch a situation.
If you absolutely have to drive it, go back to that 160* thermostat and don't go on long drives. In the meantime get a junkyard motor out of a wrecked truck - if the truck's not wrecked it might be in the junkyard because the heads are cracked and blowing coolant. Do a simple, solid rebuild on that junkyard motor. No crazy hot rod stuff, it's your daily driver. Be sure and get the block and heads magnafluxed and pressure checked.
If you absolutely have to drive it, go back to that 160* thermostat and don't go on long drives. In the meantime get a junkyard motor out of a wrecked truck - if the truck's not wrecked it might be in the junkyard because the heads are cracked and blowing coolant. Do a simple, solid rebuild on that junkyard motor. No crazy hot rod stuff, it's your daily driver. Be sure and get the block and heads magnafluxed and pressure checked.