Im a night owl but can i drive 12+hrs with 3/4hrs.of sleep. i slept ok the night before?

Not recommended: It is not recommended as it can be dangerous and decreases your concentration and make you sleepy and can cause accidents

Wouldn't do that.: Driving long distances can be sedating even if you've had predictable regular good-quality sleep. I'd be concerned about your well-being if you attempted that.

Bad idea: It is not only you taking the risk but it is everyone else on the road. Get a reasonable night sleep and drive reasonable amounts with rest in between.