Which is 1 an 2 bank on 5.7 liter engine?

There's no standard definition of "bank 1" and "bank 2" that applies universally to all 5.7 liter engines. The designation depends entirely on the engine's design and the manufacturer's labeling.

A V8 5.7 liter engine (like those found in some GM vehicles, for example) will almost certainly have two banks of cylinders (4 cylinders per bank). However, which bank is numbered "1" and which is "2" is arbitrary and determined by the manufacturer. You'll need to consult the engine's service manual or a reliable diagram specific to that engine to find out.