Your getting shocked but are you sure the plugs are firing! when in the cylinders? If you have fuel to cylinders (you say you do
both injectors are squirting), And spark to the plugs?, and air on the intake stroke entering the cylinders, you should have some type of ignition in the cylinders! Unless intake and exhaust valves are open and there is no compression and the fuel and air charge are going right through the cylinders and out the exhaust !!!!!!!!! Without these threads joined I have no Idea What Other People have answered already or if this is a junk yard engine or fresh rebuild!!! Is your Oil full of gas! If one entire bank isn't firing the gas must be going somewhere !!?? Be very careful if its building up in the pan or in the exhaust you could have a back fire or odd spark and get a huge explosion even blow the pan right off the engine or blow a valve cover off right into your face!!!!
Whats the compression 0n all you cylinders? Is it dual exhaust with cats on both sides of your exhaust It could be as simple as one cat or exhaust plugged solid Like putting a potato in a tail pipe!!!!! I saw a dead Rat that pluged an exhaust system one time LOL!!!!!! Ive seen dip sticks blown through hoods like a bullet!!!!!